Question 213511
(4x^2-6)+(-2x^2+19x)=180
4x^2-6-2x^2+19x-180=0
2x^2+19x-186=0
(2x+31)(x-6)=0
x-6=0
x=6
4*6^2-6=4*36-6=138 ans.
-2*6^2+19*6=-2*36+114=-72+114=42 ans.
Proof:
138+42=180
180=180