Question

15ab (25a² - 16b^2) = 5ab ( 5a +4b)​

Answer 1

Step-by-step explanation:

divide by 5ab on both the sides

you will get the equation as 3(25a²-16b²)=(5a+4b)

now use the identity a²-b²= (a+b)(a-b)

so in the left hand side you will get

3(5a+4b)(5a-4b)

and in lhs you will have 5a+4b

now divide both the sides by 5a+4b

you will get 3(5a-4b)=1

now open the bracket in the LHS

you will get 15a -12b =1

now bring -12b on rhs

you will get 15 a =(1+12b)

therefore a =(1+12b)/15

this is the simplest firm if the equation

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