Question

factories (x + 5)²-4(x+5)






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Answer 1

Firstly, $(x+5)^2 = (x+5)(x+5) = x^2 + 10x + 25.$

Next, $-4(x+5) = -4x - 20$

Finally, $x^2 + 10x + 25 - 4x - 20 = x^2 + 6x + 5$

If you then want to solve the equation to find x, you have to factorise the quadratic, assuming it equals 0.

$x^2 + 6x + 5 = 0$

$(x+5)(x+1)=0$

$x=-5 or -1$