Which is a factor of x^2 + 8x - 48?
(х – 6)
(х + 4)
(х – 16)
(х + 12).

Answer

(x+12)

Explanation

When your checking a factor, the sign is the opposite, so you would plug in -12 to try (x+12). -12^2 +8(-12)-48.

Then solve:

-144+144=0

(x+12) is your answer.

the answer to this question is yes

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places