Expand using identity (5x - 4) (5x +1/4)
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{(x-a)(x+b)=x^2+-(a+b)x-ab}
=>(5x-4)(5x+1/4)=25x^2-(17/4)-1
=25x^2-13/4
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The question must be (5x-1/4)(5x+1/4)
So, this is (a-b)(a+b) which is equal to (a square -b square)
Now, (25x square - 1/16).
This is the expansion of this equation.
So, this is (a-b)(a+b) which is equal to (a square -b square)
Now, (25x square - 1/16).
This is the expansion of this equation.
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