Question

find the answer correctly for 14th question ​

Answer 1

Step-by-step explanation:

a)16²-15²

=16²-(16-1)²

=16²-[16²+1²-2×16×1)

=16²-16²-1+32

=31

b)524²-523²

=524²-(524-1)²

=524²-[524²+1²-2×524×1]

=524²-524²-1+1048

=1047

c)75²

=(70+5)²

=70²+5²+2×70×5

=4900+25+700

=5625

d)95²

=(90+5)²

=90²+5²+2(90)(5)

=8100+25+900

=9025

e)5²+6²+30²

=5²+6²+(5×6)²

=25+36+(25×36)

=25+36+900

=961