Question

2A + 3 b is equal to 7 and a b is equal to 2 find 4A square plus 9B square​

Answer 1

Step-by-step explanation:

(2a+3b)²=(7)²

4a²+2*2a*3b+9b²=49

4a²+12ab+9b²=49

4a²+12*2+9b²=49

4a²+9b²=49-24

4a²+9b²=25 AnSweR..

Answer 2

Step-by-step explanation:

(2a+3b)=7

Squaring on both sides

(2a+3b)^2 =7^2

4a^2+9b^2+2(2a)(3b)= 49

4a^2+9b^2+12ab =49

4a^2+9b^2+12(2)=49

4a^2+9b^2=49-24

4a^2+9b^2=25