Question

factorise? solve the problem?? ​

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

$100 - (x - 5) {}^{2}$

$100 - (x {}^{2} + 25 - 10x)$

$100 - x {}^{2} - 25 + 10x$

$x {}^{2} - 10x - 75$

$x {}^{2} - 15x + 5x - 75$

$x(x - 15) + 5(x - 15)$

x = 15 or x= -5

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