Practice focused topic-wise MCQs with answers and explanations for quick revision and exam preparation.
Difficulty select karke sirf is topic ke focused MCQs practice karein. Score, timer aur explanations student-friendly flow me milenge.
Showing 131-140 of 600 questions.
If (-3) is a root of \(x^2+ux-18=0\), what is the value of (u)?
A. (-9)
(x=-3) रखने पर (9-3u-18=0) इसलिए (u=-3) नहीं बल्कि (u=-3)? / Putting (x=-3) gives (9-3u-18=0), so (u=-3), not (u=3).
Login to save your score, XP, coins and progress.
What are the roots of \(x^2+16x+64=0\)?
B. (-8) और (-8)(-8) and (-8)
(x-2+16x+64=(x+8)2) है। इसलिए दोनों मूल (-8) हैं। / (x-2+16x+64=(x+8)2). Therefore both roots are (-8).
Login to save your score, XP, coins and progress.
What are the roots of \(4x^2-20x=0\)?
A. (0) और (5)(0) and (5)
(4x-2-20x=4x(x-5)) है। इसलिए मूल (0) और (5) हैं। / (4x-2-20x=4x(x-5)). Therefore the roots are (0) and (5).
Login to save your score, XP, coins and progress.
Which is the root of \(x^2-18x+81=0\)?
A. (9) दो बार(9) twice
(x-2-18x+81=(x-9)2) है। इसलिए दोहराया मूल (9) है। / (x-2-18x+81=(x-9)2). Therefore the repeated root is (9).
Login to save your score, XP, coins and progress.
Which of the following values is not a root of \(x^2-100=0\)?
C. (0)
\(x^2-100=0\) के मूल (10) और (-10) हैं। (0) रखने पर समीकरण सत्य नहीं होता। / The roots of \(x^2-100=0\) are (10) and (-10). Substituting (0) does not make the equation true.
Login to save your score, XP, coins and progress.
If ((x-4)(x+9)=0), what are the roots?
C. (4) और (-9)(4) and (-9)
शून्य गुणनफल नियम से (x-4=0) या (x+9=0) होगा। इसलिए मूल (4) और (-9) हैं। / By the zero product rule, (x-4=0) or (x+9=0). Therefore the roots are (4) and (-9).
Login to save your score, XP, coins and progress.
If the roots of an equation are (4) and (-7), what is their sum?
B. (-3)
योग (4+(-7)=-3) है। ऋणात्मक संख्या जोड़ते समय चिन्ह का ध्यान रखें। / The sum is (4+(-7)=-3). Be careful with the sign while adding a negative number.
Login to save your score, XP, coins and progress.
Which monic quadratic equation has sum of roots (10) and product of roots (21)?
B. \(x^2-10x+21=0\)
\(मोनिक समीकरण (x^2-(\)योग)x+गुणनफल=0) होता है। इसलिए \(x^2-10x+21=0\) सही है। \(/ A monic equation is (x^2-(\)sum)x+product\(=0). Therefore (x^2-10x+21=0) is correct.\)
Login to save your score, XP, coins and progress.
If (4) is a root of \(2x^2-9x+n=0\), what is the value of (n)?
B. (4)
(x=4) रखने पर (32-36+n=0) इसलिए (n=4)। गणना में हर पद अलग अलग निकालें। / Putting (x=4) gives (32-36+n=0), so (n=4). Calculate each term separately.
Login to save your score, XP, coins and progress.
What are the roots of \(x^2-6x+9=0\)?
A. (3) और (3)(3) and (3)
(x-2-6x+9=(x-3)2) है। इसलिए दोनों मूल (3) हैं। / (x-2-6x+9=(x-3)2). Therefore both roots are (3).
Login to save your score, XP, coins and progress.
Use Google login or mobile OTP. Admin can block users and control login providers.