Question

find the value of x^2-15x +8 at x=2​

Answer 1

Step-by-step explanation:

Factoring x2-15x-8

The first term is, x2 its coefficient is 1 .

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

The last term, "the constant", is -8

Step-1 : Multiply the coefficient of the first term by the constant 1 • -8 = -8

Step-2 : Find two factors of -8 whose sum equals the coefficient of the middle term, which is -15 .

-8 + 1 = -7

-4 + 2 = -2

-2 + 4 = 2

-1 + 8 = 7

Observation : No two such factors can be found !!

Conclusion : Trinomial can not be factored

do in this method

Answer 2

Answer:

(-18)

Step-by-step explanation:

x^2-15x+8

=4-30+8

=(8+4)-30

=12-30

= (-18)

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