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Earn +20 ptsQ: X2 plus 8x plus 9 equals -7?
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X2 plus 8x plus 10 equals 3?
(x+ 7)(x + 1) so x = -1 or -7
What is the product of the roots of x2 - 8x plus 7 equals 0?
The roots are: x = 1 and x = 7 So: 7*1 = 7
X2 8x 9 equals -7?
x=-1
7y plus 8x plus 4 equals 20 plus 8x?
7y+ 8x + 4= 20 + 8x- 8x - 8x7y + 4 = 20- 4 - 47y=16/7 /7y= 2.28the /7 means divide by 7 :)
What are the possible values of k in the line y equals kx -2 which is tangent to the curve y equals x squared -8x plus 7?
The possible values for k are -2 and -14 because in order for the line to be tangent to the curve the discriminant must be equal to 0 as follows:- -2x-2 = x2-8x+7 => 6-x2-9 = 0 -14x-2 = x2-8x+7 => -6-x2-9 = 0 Discriminant: 62-4*-1*-9 = 0
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