7x-9=7x^2-49x
-7x -7x
-9=7x^2-56x
-9=7(x^2-8x+c)-7(c)
c=(-8/2)^2=(-4)^2=16
-9=7(x^2-8x+16)-7(16)
+112 +112
103=7(x-4)^2
/7 /7
103/7=(x-4)^2
sqrt sqrt
+/-[tex]\sqrt{14.714}[/tex]=x-4
+4 +4
x=[tex]\sqrt{14.714}[/tex]+4=3.836+4=7.836
x=4-[tex]\sqrt{14.714}[/tex]=4-3.836=0.164
Answer:
x=7.836, x=0.164
Answer:
1) 56
2) 112
3) 16
Step-by-step explanation:
on edgenuity 2020 :))
