Question

x elevado a 2-5x=0

-7x elevado a 2+x elevado a 2=0

-4x elevado a 2+9x=0

Answer 1

X^2-5x=0
X(x-5)=0
X=0
X-5=0
X=5

-7x^2+x^2=0
-6x^2=0
X(-6x)=0
X=0
-6x=0
-x=0/6
X=0

-4x^2+9x=0
X(-4x+9)=0
X=0
-4x+9=0
X=-9/-4
X=9/4