7. What is the value of (60 - 20) (60 + 20) ?
dalina:
40 +80=120
(60)^2- (20)^2= 3600 -400 = 3200
according to the question there is no sign of + so it will be 40×80 = 3200
so the answer is 3200
sorry your right
Answers
Answered by
1
(60-20) (60+20)
40(60+20)
40(80)
3200
40(60+20)
40(80)
3200
Answered by
1
we can solve this by using an algebraic identity i.e, (a+b)(a-b) = a^2 - b^2
so, (60 + 20) (60 - 20)
= 60^2 - 20^2
= 3600 - 400
= 3200
I hope this answers your question!
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