Posted by **Anonymous** on Sunday, January 23, 2011 at 10:54pm.

. (square rt. 5) +(square rt. 25) =

2. If y=x^2 +2x +k passes through the point (1,2), then k =

3. If F(x) = 1 +3x^2, where X cannot be 0, then F(x+2)-F(2)/(x) =

- math please help -
**Reiny**, Sunday, January 23, 2011 at 11:05pm
1.

√5 + √25 = √5 + 5

2.

sub in the point (1,2)

2 = 1^2 + 2(1) + k

solve for k

3.

I have a strong feeling that you meant:

(F(x+2)-F(2))/(x)

= (1 + 3(x+2)^2 - 25)/x

= (1 + 3x^2 + 12x + 12 - 13)/x

= (3x^2 + 12x)/x = 3x + 12 , x ≠ 0

check my arithmetic

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