Answer:
Step-by-step explanation:
2x²+7x=-3
2x²+7x+3=0
2x²+x+6x+3=0
x(2x+1)+3(2x+1)=0
(2x+1)(x+3)=0
x=-1/2,-3
so C
around 76.16
30 squared + 70 squared = 5800
square root of 5800 = 76.16
a squared + b squared = c squared
Answer: 429.75
Step-by-step explanation: i did it before
wild
