Question

Subtract $-5a^2-2a+1$ from the sum of $4a^2+3-7a$ and $8a-7$

• A. $9a^2+3a-3$
• B. $-9a^2-a-5$
• C. $9a^2-3a+5$
• D. $9a^2+3a-5$

Answer 1

The correct option is D $9a^2+3a-5$

The sum of $4a^2+3-7a$ and $8a-7$.

$4a^2-7a+3$
$+8a-7$
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$4a^2+a-4$
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Now, subtracting $(-5a^2-2a+1)$ from $(4a^2+a-4)$, we get,

$\Rightarrow 4a^2+a-4$
$-(-5a^2-2a+1)$

$\Rightarrow 4a^2+a-4$
$+5a^2+2a-1$
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$9a^2+3a-5$
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