VanillaAngelic VanillaAngelic

21-09-2016
Mathematics

contestada

Complete the square:
x^2 + 2x - 3 = 0

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harambelives harambelives

21-09-2016

I got x=plus or minus 1

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rabinshrestha41 rabinshrestha41

21-09-2016

[tex] x^{2} +2x-3=0 \\\\ (x)^2+2(x)(1) +(1)^2 -1^2-3 =0 \\\\ (x+1)^2-4 = 0 \\\\ (x+1)^2 = 4 \\\\ x+1 = \± \sqrt{4} \\\\ x = -1 ~\±2 \\\\ \therefore x = 1 ~~~or~~~ x = -3[/tex]

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