Question

20 x^2 - 45 y^2 factorise​

Answer 1

Please mark as brainliest....✔✔✔

Answer 2

Answer:

${20x}^{2} - {45y}^{2}$

identity used:

${a}^{2} - {b}^{2} = (a + b)(a - b)$

so let

$a = \sqrt{20} x \\ b = \sqrt{45} y$

now on putting the values in identity we get,

$= ( \sqrt{20}x + \sqrt{45} y )( \sqrt{20}x - \sqrt{45}y )$

so we have factors now.

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