Q6 If r=2x+5 Find the value of S, given the equation S=4r^2

Answer 1

To find the value of S, we first need to substitute the value of r into the equation S=4r^2

Given that r=2x+5, we can substitute this into the equation:

S = 4(2x+5)^2

Now, we need to expand and simplify the expression:

S = 4(4x^2 + 20x + 25)
S = 16x^2 + 80x + 100

Therefore, the value of S is 16x^2 + 80x + 100.