lizzy223 lizzy223
  • 23-08-2017
  • Mathematics
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I'm having trouble with this question any help?

Im having trouble with this question any help class=
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choixongdong
choixongdong choixongdong
  • 23-08-2017
answer is 2) 49/4

x^2 +7x = 11

left side
x^2 + 2 (x) (7/2) + 49/4 
= (x + 7/2)^2


Answer Link
mreijepatmat
mreijepatmat mreijepatmat
  • 23-08-2017
The added number is 49/4. Proof:

x² + 7x = 11
x² + 7x + 49/4 = 11 + 49/4
(x+7/2)² = 11+49/4


Answer Link

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