Question

find the product of (x+3)(x+2)using this, find 103×102​

Answer 1

$(x+3)(x+2) \\\\\ [ x²+x(a+b)+ab ] \\\\\ \implies x²+x(3+2)+(3)(2) \\\\\ \implies x²+3x+2x+6 \\\\\ \implies x²+5x+6$

By the same formula ,

$103 \times 102 \\\\\ \implies (100+3)(100+2) \\\\\ \implies (100)²+100(3+2)+(3)(2) \\\\\ \implies 10000 +100(5)+6 \\\\\ \implies 10506$