Question

8-Efetue como achar melhor

a) (m-3)²
b) (2a-5)²
c) (7-3c)²
d) (5x-2y)²
e) (2-x³)²
f) (xy-10)²
g) (x-0,2)²
h) (-4x-3y)²

Answer 1

(m-3)² = (m-3)(m-3) = m²-6m+9
(2a-5)² = (2a-5)(2a-5) = 2a²-20a+25
(7-3c)² = (7-3c)(7-3c) = 49-42c+9c
(5x-2y)² = (5x-2y)(5x-2y) = 25x²-20xy+4y²
(2-x³)² = (2-x³)(2-x³) = 4-4x³+x 6
(xy-10)² = (xy-10)(xy-10) = x²y²-20xy+100
(x-0,2)² = (x-0,2)(x-0,2) = x²-0,4x+0,4
(-4x-3y)² = (-4x-3y)(-4x-3y) = 16x²-24xy+3y²