Question

factories x² - 8x - 84 using suitable identity​

Answer 1

Answer:

1.1 Factoring x2-8x-84

The first term is, x2 its coefficient is 1 .

The middle term is, -8x its coefficient is -8 .

The last term, "the constant", is -84

Step-1 : Multiply the coefficient of the first term by the constant 1 • -84 = -84

Step-2 : Find two factors of -84 whose sum equals the coefficient of the middle term, which is -8 .

-84 + 1 = -83

-42 + 2 = -40

-28 + 3 = -25

-21 + 4 = -17

-14 + 6 = -8 That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -14 and 6

x2 - 14x + 6x - 84