Question

(4x+7)(4x-7)= mim ajudem

Answer 1

Boa Noite!

$(a+b)*(a-b)=a^2-ab+ab-b^2 \\ \\ \\ (a+b)*(a-b)=a^2-b^2$

$(4x+7)*(4x-7)= 16x^2-28x+28x-49 \\ \\ \\ (4x+7)*(4x-7)=16x^2-49$

Answer 2

(4 x + 7 ) ( 4 x - 7 )= 16 x² - 49