Question 624904
(x+2z)(2x+z)..??
How to solve the given above problem using (a+b)(a-b) identity and 4ab=(a+b)^2 - (a-b)^2  identity...??
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There's nothing to solve.  Equations are solved.
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(x+2z)(2x+z)..??
= x*(2x+z) + 2z*(2x+z)
= {{{2x^2 + xz + 4xz + 2z^2}}}
= {{{2x^2 + 5xz + 2z^2}}}
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How to solve the given above problem using (a+b)(a-b) identity and 4ab=(a+b)^2 - (a-b)^2  identity...??
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(x+2z)(2x+z) is not a sum and difference, like (a+b)(a-b)