Answer:
you would have to use repletion
Step-by-step explanation:
2x^2+5x+7=20
-7 -7
2x^2+5x=13
/5 /5
2x^2+x=2.6
4+2x=2.6
-4 -4
2x=-1.4
/2 /2
x=-0.7
