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January 26, 2015

January 26, 2015

Posted by **Kathy** on Wednesday, September 3, 2014 at 6:37pm.

f(x)=4(x-1)^-8

(x-1) (x-1)=

4(x^-2x+1)-8

4x^-2x-8

- algebra 2 -
**Steve**, Wednesday, September 3, 2014 at 7:13pmUse a number with exponents.

4(x-1)^2 - 8

4(x^2-2x+1)-8

4x^2-8x+4-8

4x^2-8x-4

You must multiply the 4 by each term in the parentheses, not just the first one.

4(2+6) = 4*2 + 4*6 = 8+24 = 32

NOT

4(2+6) = 4*2+6 = 8+6 = 14

after all, 2+6=8, and 4*8 = 32

- algebra 2 -
**Reiny**, Wednesday, September 3, 2014 at 7:13pmf(x) = 4(x-1)^2 - 8

= 4(x^2 - 2x + 1) - 8

= 4x^2 - 8x + 4 - 8

= 4x^2 - 8x - 4

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