Question

(×+5)(×-7)=0 matemática ​

Answer 1

Explicação passo-a-passo:

(×+5)(×-7)=0

x²-7x+5x-35=0

x²-2x-35=0

a=1

b=-2

c=-35

∆=b²-4ac

∆=(-2)²-4×1×-35

∆=4+140

∆=144

-b±√∆/2a

2±√144/2×1

2±12/2

x¹=2+12/2=14/2=7

x²=2-12/2=-10/2=-5