Question

factorise
x^2-15x-225 = 0​

Answer 1

Answer:

The first term is, x2 its coefficient is 1 .

The middle term is, -15x its coefficient is -15 .

The last term, "the constant", is -225

Step-1 : Multiply the coefficient of the first term by the constant 1 • -225 = -225

Step-2 : Find two factors of -225 whose sum equals the coefficient of the middle term, which is -15 .

Step-by-step explanation:

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