brooklyn12344 brooklyn12344

19-09-2019
Mathematics

contestada

PLEASE HELP
Expand (r + 3)^2

Respuesta :

mahamahmood95 mahamahmood95

19-09-2019

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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