Question
Easy Mathematics
Quadratic Equations Introduction to Quadratic Equations Class 10 Level 30
समीकरण \(0x^2+2x+3=0\) द्विघात क्यों नहीं है?
Why is \(0x^2+2x+3=0\) not quadratic?
#quadratic-equations
#non-quadratic
#a-zero
A क्योंकि (c=3) है / Because (c=3)
B क्योंकि \(x^2\) का गुणांक (0) है / Because the coefficient of \(x^2\) is (0)
C क्योंकि (x) का गुणांक (2) है / Because the coefficient of (x) is (2)
D क्योंकि इसमें स्थिर पद है / Because it has a constant term
Explanation opens after your attempt
Correct Answer
B. क्योंकि \(x^2\) का गुणांक (0) है / Because the coefficient of \(x^2\) is (0)
Step 1
Concept
Here the coefficient of \(x^2\) is (0), so the \(x^2\) term disappears. For a quadratic equation, \(a\neq 0\) is necessary.
Step 2
Why this answer is correct
The correct answer is B. क्योंकि \(x^2\) का गुणांक (0) है / Because the coefficient of \(x^2\) is (0). Here the coefficient of \(x^2\) is (0), so the \(x^2\) term disappears. For a quadratic equation, \(a\neq 0\) is necessary.
Step 3
Exam Tip
यहाँ \(x^2\) का गुणांक (0) है इसलिए \(x^2\) पद समाप्त हो जाता है। द्विघात के लिए \(a\neq 0\) जरूरी है।
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Question
Easy Mathematics
Quadratic Equations Introduction to Quadratic Equations Class 10 Level 28
कौन सा समीकरण द्विघात नहीं है?
Which equation is not quadratic?
#quadratic equations
#not quadratic
#degree
A \(x^2+x+1=0\)
B \(2x^2-3=0\)
C \(x^3+x+1=0\)
D \(4x^2=7\)
Explanation opens after your attempt
Correct Answer
C. \(x^3+x+1=0\)
Step 1
Concept
The degree of \(x^3+x+1=0\) is (3). So it is not a quadratic equation.
Step 2
Why this answer is correct
The correct answer is C. \(x^3+x+1=0\). The degree of \(x^3+x+1=0\) is (3). So it is not a quadratic equation.
Step 3
Exam Tip
\(x^3+x+1=0\) की घात (3) है। इसलिए यह द्विघात समीकरण नहीं है।
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Question
Easy Mathematics
Quadratic Equations Nature of Roots Class 10 Level 37
समीकरण \(x^2+14x+49=0\) के लिए सही उत्तर चुनिए।
Choose the correct answer for \(x^2+14x+49=0\).
#quadratic equations
#numerical
#equal roots
A दो वास्तविक और समान / two real and equal
B दो वास्तविक और असमान / two real and distinct
C वास्तविक मूल नहीं / no real roots
D द्विघात नहीं / not quadratic
Explanation opens after your attempt
Correct Answer
A. दो वास्तविक और समान / two real and equal
Step 1
Concept
(D=142 -4(1)(49)=0). Hence the roots are equal and real.
Step 2
Why this answer is correct
The correct answer is A. दो वास्तविक और समान / two real and equal. (D=142 -4(1)(49)=0). Hence the roots are equal and real.
Step 3
Exam Tip
(D=142 -4(1)(49)=0) है। अतः मूल समान वास्तविक हैं।
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