If ab = 5, then (a + b)2 – (a - b)2 =
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Answer:
ab=5 Then,
we have to put formula that,
(a+b) ²=a²+b² +2ab
(a-b) ²=a²+b²-2ab
a²+b²+2ab-a²+b²-2ab
5²+5²+2(5×5) -5²+b²-2(5×5)
25+25+100 -25+25-100
200-125+25
25+25
50ans....
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