Question

Mim ajudem pfv 5×+3×+5=-7

Answer 1

Explicação passo-a-passo:

5x+3x+5= -7

8x+5= -7

8x= -7-5

8x= -12

x= -12/8

x= -6/4

x= -3/2

Mas se for:

5x²+3x+5= -7

5x²+3x+5+7=0

5x²+3x+12=0

x= -3±√3²-4∗5∗12/2∗5

x= -3±√9-240/10

x= -3±√-231/10