Question 92068: Hello out there,I may be in the wrong place for these problems but I didn't see any other place for my problems,The first one is,Find the value of c that makes the trinomial a perfect square:x^2+16x+c.The next one is,Find the value of c that makes the trinomial a perfect square:x^2minus8x+c.The third one is,Solve by completing the square:x^2+4xminus5=0.And the last one is,Solve by completing the square:p^2minus8p=0.Thanks to whoever can help.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The first one is,Find the value of c that makes the trinomial a perfect square:x^2+16x+c.
Square half the coefficient of the 1st degree term:
x^2+16x+[(1/2)16]^2
=x^2+16x+64
--------------------
The next one is,Find the value of c that makes the trinomial a perfect square: x^2minus8x+c
x^2-8x+4^2
x^2-8x+16
---------------------
The third one is,Solve by completing the square:x^2+4xminus5=0.
x^2+4x+? = 5+?
x^2+4x+4 = 5+4
(x+2)^2 = 9
Take the square root:
x+2 = 3 or x+2 = -3
x = 1 or x = -5
----------------
And the last one is,Solve by completing the square:p^2minus8p=0.
p^2-8p+? = ?
p^2-8p+16 = 16
(p-4)^2 = 16
Take the square root:
p-4 = 4 or p-4=-4
p = 8 or p = 0
=======================
Cheers,
Stan H.
|
|
|
