What is a +b square plz i need help i will mark brainliest

a² + 2ab + b²

Step-by-step explanation:

Given

(a + b)²

= (a + b)(a + b)

Each term in the second factor is multiplied by each term in the first factor, that is

a(a + b) + b(a + b) ← distribute both parenthesis

= a² + ab + ab + b² ← collect like terms

= a² + 2ab + b²

(2,9)

i think thats the answer i checked it on google

answer: 12

step-by-step explanation: