Question

(2a+2b)2 selvo
$(2a + 3b) {}^{2}$

Answer 1

(2a +3b)²
(a+b)²=a²+2ab+b²
(2a+3b)²=(2a)²+(2*2a*3b)+(3b)²
               =4a²+12ab+9b²

Answer 2

The formula is -------------

$(a + b)^{2} \\ = a^{2} + 2ab + b ^{2}$

$(2a + 2b)^{2} \\ = (2a)^{2} + 2 \times 2a \times 2b + (2b)^{2} \\ = 4a^{2} + 8ab + 4b^{2}$
$(2a + 3b)^{2} \\ = (2a)^{2} + 2 \times 2a \times 3b + (3b)^{2} \\ = 4a^{2} + 12ab + 9b^{2}$

Hope it will help you .