Question

Resolver essa expressão (4x +5)×(5x-7)

Answer 1

(4x + 5) . (5x - 7)

= 4x . 5x - 7 . 4x + 5 . 5x + 5 . (- 7)

= 20x² - 28x + 25x - 35

= 20x² - 3x - 35

Answer 2

$(4x + 5) \: . \: (5x - 7) \\ \\ 4x \: . \: (5x - 7) + 5(5x - 7) \\ \\ 20x {}^{2} - 28x + 25x - 35 \\ \\ \boxed{\boxed{\boxed{20x {}^{2} - 3x - 35 }}}$

atte. yrz