Question

menos x cuadrado más 2x + 15 es igual

Answer 1

(-x²)+(2x+15)= -x²+2x+15                     

Pd: Por si acaso quisieras el valor de X:

a=-1    b=2    c=15

(-b+/-√b²-4ac)/2a
(-2+/-√2²-4(-1)(15))/2(-1)
(-2+/-√4+4(15))/-2
(-2+/-√4+45)/-2
(-2+/-√49)/-2
(-2+/-7)/-2

X1= (-2+7)/-2

X1= 5/-2

X1= -2.5

X2= (-2-7)/-2

X2= -9/-2

X2= 4.5

X1=-2.5

X2=4.5