4+3√5by 4-3√5=a+b √5 find the value of a and b
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Answered by
141
(4+3√5)×(4-3√5)=a+b√5
using identity: (a+b)(a-b)= a^2-b^2
a=4
b=3√5
= (4)^2 - (3√5)^2=a+b√5
= 16 - (9×5)=a+b√5
= 16 - 45= a+b√5
=so.. a=16
b=-45√5
hope it helps... :)
using identity: (a+b)(a-b)= a^2-b^2
a=4
b=3√5
= (4)^2 - (3√5)^2=a+b√5
= 16 - (9×5)=a+b√5
= 16 - 45= a+b√5
=so.. a=16
b=-45√5
hope it helps... :)
Answered by
67
The answer's in the picture below.
Hope it helps
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