3 years ago

PLEASE HELP Expand (r + 3)^2

Mathematics

1 answer:

vivado [14]3 years ago

4 0

Answer:

r²+6r+9

Step-by-step 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

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