Question

factorise the
${x}^{2} + 25x - 100$
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Answer 1

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factorise :-

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

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$➪ {x}^{2} + 25x - 100 = 0$

$➪ {x}^{2} + 20x + 5x - 100 = 0$

$➪x(x + 20) - 5(x + 20)$

$➪(x - 5)(x + 20)$

$➪x = 5 \: and \: x = - 20$

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Answer 2

x²+25x-100

=x²+20x+5x-100

=(x²+20x)+(5x-100)

=x(x+20)+5(x-20)

=(x+5)(x-20)

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