X2 plus 9x equals -7

Anonymous

∙ 11y ago

Updated: 8/18/2019

If you're looking to solve that equation for x, it can be done as follows:

x2 + 9x = -7

x2 + 9x + (9/2)2 = (9/2)2 - 7

(x + 9/2)2 = 81/4 - 28/4

x + 9/2 = ±√(53/4)

x = -9/2 ± √53/2

Wiki User

∙ 11y ago

What else can I help you with?

What are the points of intersection of the curves y equals x2 -7x plus 8 and y equals -x2 plus 9x -6 showing work?

If: y = x2-7x+8 and y = -x2+9x-6 Then: x2-7x+8 = -x2+9x-6 So: 2x2-16x+14 = 0 => x2-8x+7 = 0 Therefore: x = 1 and x = 7 By substitution: x =1, y = 2 and x = 7, y = 8 Points of intersection: (1, 2) and (7, 8)

What is the slope of 9y plus 9x plus 7 equals 8 plus 9x?

The slope is 0.

What is the anwer to 4x plus 7 equals 9x plus 7?

4x+7=9x+7 -5x=0 x=0

What is the limit as x approaches -7 for x2 plus 9x plus 14 divided by x plus 7?

-5

What is x when 9x plus 7 equals 6x plus 25?

If: 9x+7 = 6x+25 Then: x = 6

Factor the trinomial x2 plus 9x plus 14?

(x+7)(x+2)

Combine like terms 3x plus 7 X2 plus 9x?

12x+14

What is the answer to 9x plus 7 equals 15x plus 1 and how do you find it?

9x + 7 = 15x + 1 ___-1_______-1 9x + 6 = 15x -9x_____-9x ____6=6x ____/6_/6 ____1=x x equals 1.

X2 plus 7 equals 36?

if x2 + 7 = 37, then x2 = 29 and x = ±√29

Is y plus 7 equals 3x and 9x-y equals -7 parallel with each other?

No because they don't have the same slope (9x & 3x)

9x plus 4 equals x-7?

9x+4 =x-7 8x=-3 x=-3/8

What is 7x - 4 equals 9x plus 10?

7x-4=9x+10-14=2xx=-7

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