Answer:
Step-by-step explanation:
2x²+8=80
2x²=80-8=72
x²=72/2=36
x=±√36
x=±6
so x=6 is one solution other is x=-6
Because it’s important to know the equation so that would be easy to know the quadratic formula and easy to solve the problem
I got -648 for the product
Answer:
0.5
Step-by-step explanation:
0.5 x 4 = 2, 2 + 7 = 9
I'm guessing 99.65
1800+10%-20%-25%=99.65
but it probably wrong
