Q.If a*b=a²+b² and a.b=a²-b², then value of (5*2).25 is
A.225
B.226
C.216
D.215
Answers
Answered by
1
2×5=10
10×25=225
A) is correct answer
10×25=225
A) is correct answer
Answered by
1
the answer is 216
( 5*2).25
= (5*5 +2*2) = 29 ( a*b = a^2 + b^2)
now,
(29.25) = 29^2 - 25^2 = 216 (a.b = a^2 - b^2)
( 5*2).25
= (5*5 +2*2) = 29 ( a*b = a^2 + b^2)
now,
(29.25) = 29^2 - 25^2 = 216 (a.b = a^2 - b^2)
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