Question

x²-(y-z)² factorise
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Answer 1

Step-by-step explanation:

$x {}^{2} - (y {}^{} - z) {}^{2} \\ = x {}^{2} - (y {}^{2} + z {}^{2} - 2yz) \\ = x {}^{2} - y {}^{2} - z {}^{2} + yz$

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Answer 2

Answer:

(x+y-z)(x-y+z)

Step-by-step explanation:

x²-(y-z)²

={x+(y-z)}{x-(y-z)}

=(x+y-z)(x-y+z)