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If \(q(x)=x^3+2x^2-4x\), what is the value of \(q(-2)\)?यदि \(q(x)=x^3+2x^2-4x\) है, तो \(q(-2)\) का मान क्या होगा?
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Correct answer:सही उत्तर: 88
Substituting \(x=-2\), we get \(q(-2)=(-2)^3+2(-2)^2-4(-2)=-8+8+8=8\). Note that \((-2)^2=4\) and \(-4(-2)=+8\); always use parentheses when substituting a negative value.\(x=-2\) रखने पर \(q(-2)=(-2)^3+2(-2)^2-4(-2)=-8+8+8=8\)। यहाँ \((-2)^2=4\) और \(-4(-2)=+8\) होता है; ऋणात्मक संख्या का मान रखने से पहले कोष्ठक लगाना न भूलें।
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