Question

expand (3p - 5q + 2r )² using suitable identity​

Answer 1

Answer:

$(3p-5q+2r)^2 \\\\ \text{Using formula}=(x+y+z)^2=x^2+y^2+z^2+2xy+2yz+2xz\\\\ \text{Where} \ x=3p, \ y=-5q, \ z=2r \\\\ (3p)^2+(-5q)^2+(2r)^2+2(3p)(-5q)+2(-5q)(2r)+2(3p)(2r) \\\\ 9p^2+25q^2+4r^2-30pq-20qr+12pr \ \ \sf{Answer} \\\\\\\\ \text{rohangupta0424}$