Help 10 points?

2016-12-17 5:31 am

Solve the polynomial equation below. Set = 0, factor, split/solve, write answer in set notation)
x^2-11x=-28

更新1:

please show all work

回答 (4)

2016-12-17 5:40 am

x² - 11x + 28 = 0
[ x - 7 ] [ x - 4 ] = 0
x = 4 , x = 7
solution set { 4 , 7 }

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2016-12-17 6:18 am

x^2-11x+28=0
(x-7)(x-4)=0,,
x=7,x=4
solution {4,7}

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2016-12-17 5:38 am

==> x^2 -11x + 28 = 0
==> (x-4)(x-7) = 0
==> x = 4 or 7

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2016-12-17 5:33 am

{x = 4}, {x = 7}

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