Question

Evaluate the derivative of 3x^2 + x^2 + 6x at x = -2​

Answer 1

$3x^{2} + x^{2} + 6x$

$\implies3( - 2)^{2}+( - 2)^{2} + 6( - 2)$

$\implies3 \times 4 + 4 + ( - 12)$

$\implies12 + 4 - 12$

$\implies 4$

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