Question

if 3 X + 2 X by 7 then find the value of 9 x square - 4 x square​

Answer 1

Answer:

Step-by-step explanation:

Given

3x+2x=7

5x=7

x=7/5

Now

$9x^{2} -4x^{2} =(3x+2x)(3x-2x)\\=7(x)\\=7(7/5)\\=49/5$