Question

sendo a+b=18 e a-b=9, calcule a²-b²​

Answer 1

a+b=18

a-b=9

a²-b²=?

a²-b²=(a+b)(a-b)=(18)(9)=162

$\boxed{ \boxed{ \boxed{ \mathsf{ {a}^{2} - {b}^{2} = 162}}}}$

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