Question

Using identities, evaluate.
1.05X9.5

Answer 1

1.05 × 9.5

= ( 1.00 + 0.05 ) ( 1.00 - 0.5 )

$<b>( x + a ) ( x + b ) = x² - x ( a - b ) - ab</b>$

= ( 1.00 )² - ( 1.00 ) ( 0.05 - 0.5 ) - ( 0.05 ) ( 0.5 )

= $<b><u>9.975</b></u>$

Answer 2

(1.05 X 9.5) = (1+0.05)(1-0.5)
by formula , (a+b)(a-c) = a²-a(c-b) -bc
so , a= 1
b= 0.05
c= 0.5
so answer is 9.975
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