Answer:
BGC=180-90
=90
BGC=BGE+EGC
BGC=BGE+15
90=BGE+15
BGE=90-15
BGE=75
BGE=AGF
AGF=X,
X =75
b=19
Step-by-step explanation:
2x(3x+5)+3(3x+5)= (3x+5)(2x+3)= 6x²+ 9x+10x+15=6x²+19x +15
6x² + 19x +15 = ax²+bx+c
a=6, b=19, c=15
