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Question
junior college 1 | H2 Maths
One Answer Below
Anyone can contribute an answer, even non-tutors.
please help!! much appreciated :)
Date Posted: 4 years ago
Views: 231
One thing we can first do before hand is to complete the square for x^2 + 4x - 1.
x^2 + 4x - 1
= x^2 + 4x + 4 - 4 - 1
= (x + 2)^2 - 4 - 1
= (x + 2)^2 - 5
and this -5 gets brought over to the other side of the equation.
x^2 + 4x - 1
= x^2 + 4x + 4 - 4 - 1
= (x + 2)^2 - 4 - 1
= (x + 2)^2 - 5
and this -5 gets brought over to the other side of the equation.
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done
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clear
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Something like this would be good.
Date Posted:
4 years ago
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