in simplist form it should be 3x+16
1 because you replace x with 2 so, (2)squared -5x2 + 7 = 4 - 10 + 7 = 1
Answer: Simplified Equation (10x-10)
Answer if 3=x is 20
Step-by-step explanation:
the original side lengths are 3x and (2x-5) so multiply both those by 2.
Now you have 6x and 4x-10.
Now combine those and you have 10x-10.
Then plug in 3 for x