Question

2
(i) (196)
Evaluate: (i) 69 x 71
Evaluate: (i) 88 x 92
"ill in the blanks:
(il The square of an​

Answer 1

Answer:

i) 69×71

=(70-1)×(70+1)

=70^2+(-1+1)70+(-1×+1)

=4,900-70+70-1

=4,899

ii) 88×92

=(90-2)×(90+2)

=(90)^2-(2)^2

=8096