Question

how to solve this answer??????????
( solve for x and give the aNswer in intervAl form)
i) x^2+7x-8≤0

(ii)....3...... > ..1..
|1-2x| 2

Answer 1

for the first one...

x^2 + 7x - 8 ≤ 0
(x+8) (x-1) ≤ 0 <<<--- factor the expression

Then what x values will create a zero or a negative on the left of the inequality?
1) x greater than or equal to -8 makes (x+8) ≤ 0
2) x less than or equal 1 makes (x-1) ≤ 0

So the interval for x that makes the inequality true is "x greater than or equal to -8, x less than or equal to 1"

-8 ≤ x ≤ 1

Does that make sense?

Answer 2

jakeV8...thank u..

Answer 3

you are welcome :)

Answer 4

how about second question... do u know to solve it....