Question

equação de 2 grau -6x²+40x=90-8x

Answer 1

-6x²+40x=90-8x
-6x²+40x+8x-90=0
-6x²+48x-90==
Δ=b²-4ac
Δ=48²-4*(-6)*(-90)
Δ=2304-2160
Δ=144
√Δ=12
x=-b+-√Δ/2*a
x'=-48+12/-12=-36/-12=3
x"=-48-12/-36=-60/-36=5/3