1.

Expansion:-(3x + 5y +2z) (3x - 5y+2z)​

Answer»

a=3X+2z

b= 5Y

(3x+2z)^2 -(5y)^2

using INDENTITY third = a^2 -b^2=(a+b) (a-b)

Then ,a=3x and b=2z

(3x)^2 +2*3x*2z+2z^2 -25y^2

using indentity first =(a+b)^2 = a^2+2ab+b^2

=9x^2+12xy+4z ^2 -25y^2 ans


Discussion

No Comment Found

Related InterviewSolutions