What is expand (4/5 x-2/7 y)(4/5 x+2/7 y) ?

The solution to expand (4/5 x-2/7 y)(4/5 x+2/7 y) is (784x^2-100y^2)/(1225)

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expand (4/5 x-2/7 y)(4/5 x+2/7 y)

expand

(\frac{4}{5} x - \frac{2}{7} y) (\frac{4}{5} x + \frac{2}{7} y)

\frac{784 x ^{2} - 100 y ^{2}}{1225}

Solution steps

(\frac{4}{5} x - \frac{2}{7} y) (\frac{4}{5} x + \frac{2}{7} y)

Apply Difference of Two Squares

(\frac{4}{5} x - \frac{2}{7} y) (\frac{4}{5} x + \frac{2}{7} y) : \frac{784 x ^{2} - 100 y ^{2}}{1225}

= \frac{784 x ^{2} - 100 y ^{2}}{1225}

\frac{1}{s ^{2} ( s ^{2} + 1 )}

\frac{s}{( s + 2 ) ( s ^{2} + 4 )}

(x + \frac{1}{2}) (x - 3)

(x - 2)^{2}

(x sin (x) + 1) d y + (y sin (x) + x y cos (x)) d x

What is expand (4/5 x-2/7 y)(4/5 x+2/7 y) ?
The solution to expand (4/5 x-2/7 y)(4/5 x+2/7 y) is (784x^2-100y^2)/(1225)