Question

factorise x²+7x+129​

Answer 1

Answer:

(1): "x2" was replaced by "x^2".

STEP

1

:

Trying to factor by splitting the middle term

1.1 Factoring x2-7x-129

The first term is, x2 its coefficient is 1 .

The middle term is, -7x its coefficient is -7 .

The last term, "the constant", is -129

Step-1 : Multiply the coefficient of the first term by the constant 1 • -129 = -129

Step-2 : Find two factors of -129 whose sum equals the coefficient of the middle term, which is -7 .

-129 + 1 = -128

-43 + 3 = -40

-3 + 43 = 40

-1 + 129 = 128

Observation : No two such factors can be found !!

Conclusion : Trinomial can not be factored