Question

PRECISO DE SOLUÇOES!

C) x^2-7x=6-2x
D) (x-3)^2 + (x+2)^2=10
E) 5x^2 - 9x + 8 = 2-x^2
F) (2x+3)^2 = 10- (x+4) (x-2)

Answer 1

c) x^2 - 7x = 6 - 2x
x^2 - 7x - 6 + 2x = 0
x^2 - 5x - 6 = 0

d) (x-3)^2 + (x+2)^2 = 10
x^2 - 6x + 9 + x^2 + 4x + 4 - 10 = 0
2x^2 - 2x + 3 = 0

e) 5x^2 - 9x + 8 = 2 - x^2
5x^2 - 9x + 8 - 2 + x^2 = 0
6x^2 - 9x + 6 = 0

f) (2x + 3)^2 = 10 - (x+4)*(x-2)
4x^2 + 12x + 9 = 10 - x^2 + 4x + 4x - 8
4x^2 + 12x + 9 - 10 + x^2 - 8x + 8 = 0
5x^2 + 4x + 7 = 0