637 is the answer because our value is 980 we all know the unknown value with x for the step above 980 and 100% and 65% is the result in a pair of a simple equations
Length= 2*width
area=l*w=2*width*width=2*width^2
area+160=(2*width+1)*(width+1)
A+160=2w^2+2w+w+1
A+160=2w^2+3w+1
putting value of a
2w^2+160=2w^2+3w+1
160=3w+1
w=53m
l=106m
Rectangle side length is 20
20 times 5=100
Sq 10x10=100
It’s A because a trinomios has three terms and the last digit 12 doesn’t change unlike 2y which changes with every input of y.
