F(x)= 2x² -10
f(5)= 2(5)²-10
f(5)= 40
1. 504=3x
x=168
2. 64=20m
m=3.2
Jt wldbd be 1200 since you are subtractjnh and addibg
Given:
Two similar rectangles.
To find:
The area of the larger rectangle.
Solution:
Let x be the other side of the larger rectangle.
Corresponding sides of similar figures are always congruent.


The other side of larger rectangle is 2 cm.
We know that, area of rectangle is

So, area of the larger rectangle is


Therefore, the area of the larger rectangle is 8 sq. cm.