What is the value of (m- n)(n+ m) when m=3 and n= 4?

asked Aug 15, 2022 209k views

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4 votes

Answer:

$\boxed{-7}$

Explanation:

$\sf (m- n)(n+ m)$

$\sf m=3$

$\sf n=4$

___________________

$\sf \left(3-4\right)\left(4+3\right)$

Follow PEMDAS operations:

$\sf \left(3-4\right)$

$\sf =-1$

$\sf \left(4+3\right)$

$\sf =7$

$-1* \:7$

$\sf =-7$

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