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October 21, 2014

October 21, 2014

Posted by **India** on Friday, April 20, 2012 at 11:10am.

x squared = 4-y

x = y+2

- Mathematics -
**Sam**, Friday, April 20, 2012 at 11:13amExpress 3x squared + 2x + 1 in the form a(x+p)squared + q where a,p and q are real numbers

- Mathematics -
**Reiny**, Friday, April 20, 2012 at 1:02pmx^2 = 4-y and x = y+2

sub the 2nd into the first

(y+2)^2 = 4-y

y^2 + 4y + 4 = 4-y

y^2 + 5y = 0

y(y+5) = 0

y = 0 or y = -5

if y = 0 , then x = 4-0 = 4

if y = -5 , then x = 4-(-5) = 9

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