Question

X^+8x+15=0
Quero a resposta com cálculo

Answer 1

X²+8X+15=0
∆=8²-4.1.15
∆=64-60
∆=4

X= -8±✓4
2.1
X'=-8+2 = -6 = -3
2. 2
X"= -8-2 = -10= -5
2. 2