Question

PLEASE HELP
Expand (r + 3)^2

Answer 1

r²+6r+9

Explanation:

for the expansion of (r+3)², we use the formula as,

(a+b)²=a²+2ab+b²

here, we have

a=r

b=3

plug in all the values

(r+3)²=r²+2(r)(3)+3²

solving the equation

(r+3)²=r²+6r+9