expand (0.9p-0.5q)^2
Answers
Answered by
29
(a-b)^2 = a^2+b^2-2ab
in your question a=0.9p and b=0.5q
(0.9p-0.5q)^2 = (0.9p)^2 + (0.5q)^2 - 2(0.9p)(0.5q)
= 0.81p^2 + 0.25q^2 - 0.9pq
Answered by
20
(0.9p-0.5q)²
apply identity ,
(a-b)²
a²+b²-2ab
by applying this identity,
we get,
(0.9)²+(0.5)²-2×0.9×0.5
0.81+0.25-0.45
0.81-0.20
=0.61 answer
apply identity ,
(a-b)²
a²+b²-2ab
by applying this identity,
we get,
(0.9)²+(0.5)²-2×0.9×0.5
0.81+0.25-0.45
0.81-0.20
=0.61 answer
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