Question

gente me ajuda prfvr

a) (4x - 9)²
b) (5x + y) × (5x - y)
c)(3a + 8b)²
​

Answer 1

a) (4x-9)² =

(4x)²-2(4x)(9)+(9)²

16x²-72x+81

b) (5x+y)(5x-y) =

25x²-5xy+5xy+y²

25x²+y²

c) (3a+8b)² =

(3a)²+2(3a)(8b)+(8b)²

9a²+48ab+64b²

❤️ Boa tarde ❤️

18/05