Question

f (x) +x²+ 2x -15? Me ajudem pfv

Answer 1

Δ=B² -4 .a.c

Δ=(2)² -4.1.(-15)

Δ=4 + 60

Δ= 64

x= $x=\frac{-b +- \sqrt{64}}{2.a} x=\frac{-(-2) +-\sqrt{64} }{2.1}$

x1= 2+8\2 = 10\2 = 5

x2= 2 -8\2 = -6\2 = -3