Question

Me ajudem !
a) (x - 7)(x - 9) = 0
b) 4(x - 5)( x + 2 = 0
c) x(x + 1)(x + 2) = 0
d) ( x + 6)( x - 11)( x + 8) = 0

Answer 1

a)(x-7)(x-9)=0

x^2-9x-7x+63
x^2-16x+63

b)4(x-5)(x+2)=0

4×x^2+2x+5x-25
4x^2+7x-25

c)x (x+1)(x+2)=0

x×x^2+x+1
2x^2+x+1
3x^2+x