Factor completely .
4u^2 - 100

4(u - 5)(u + 5)

Step-by-step explanation:

We have the expression,

Factor out 4:

25 can be written as

Use difference of squares property:

=

.

Step-by-step explanation:

Make use of the fact that the difference of two perfect squares, , could be rewritten as a product of the form . That is:

.

In this question, the two squares are and , respectively. Thus:

.

Simplify this expression even further:

.

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.

step-by-step explanation:

de-gf

hj=3x+20

ji=15x-64