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8x2 - 2x - 15 = 0 factorises as (2x - 3)(4x + 5) ie x = 3/2 or -5/4 ( 1½ or -1¼) Check: 8 x 9/4 - 3 = 72/4 - 3 = 18 - 3 = 15 OK 8 x 25/16 - (-10/4) = 25/2 + 5/2 = 12.5 + 2.5 = 15 OK QED
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Solve the equation by factoring 15 equals 8x2-14x?
15 = 8x2 - 14x; whence, 8x2 - 14x - 15 = (2x - 5)(4x + 3) = 0. Therefore, x = 5/2 or -3/4.
8x squared - 2x - 2 equals 1?
8x2-2x-3=0 so we can factor this and we have: (4x-3)(2x+1)=0 So either (4x-3)=0 and x=3/4 or (2x+1)=0 and x=-1/2 The answers are 3/4 or .75 or -1/2 or -.5
How many real number solutions does the equation -8x2-8x-2 equals 0 have?
Divide all terms by -2: 4x2+4x+1 = 0 (2x+1)(2x+1) = 0 x = -1/2 and also x = -1/2 The quadratic equation has 2 equal roots.
-2x plus 14 equals 0?
If -2x +14 = 0, -2x = -14, or x = 7.
2x - 4x plus 3 equals 0?
2x - 4x + 3 = 0 -2x + 3 = 0 2x = 3 x = 3/2 = 1.5
What is 8x2-2x-15 equals 0?
8x2-2x-15 = 0 (2x-3)(4x+5) = 0 x = 3/2 or x = -5/4
Solve the equation by factoring 15 equals 8x2-14x?
15 = 8x2 - 14x; whence, 8x2 - 14x - 15 = (2x - 5)(4x + 3) = 0. Therefore, x = 5/2 or -3/4.
What is the answer 8x2-2x-3 equals 0?
8x2-2x-3=0 (2x+1)(4x-3)=0 2x+1=0 or 4x-3=0 x=-1/2 or x=3/4
8x2 plus 2x - 3 equals 0?
(4x + 3)(2x - 1) so x = -0.75 or 0.5
How do you solve 8x2 plus 16x plus 8 equals 0?
8x2 + 16x + 8 = 0
Where are the points of contact made on the x and y axes when y equals 8x2 -26x plus 15?
The x-axis is y = 0 → y = 8x² - 26x + 15 → 0 = 8x² - 26x + 15 = (4x - 3)(2x - 5) So 4x - 3 = 0 → 4x = 3 → x = ¾ = 0.75 or 2x -5 = 0 → 2x = 5 → x = 2½ = 2.5 The y-axis is x = 0 → y = 8x² - 26x + 15 = 8 × 0² - 26 × 0 + 15 = 15 → The points of contact with the x- and y- axes of y = 8x² - 26x + 15 are: (0.75, 0), (2.5, 0), (0, 15)
2x - 5y plus 15 equals 0 written in slope-intercept form?
2x-5y+15=0 -5y=-2x-15 y=(2/5)x+3
8x squared - 2x - 2 equals 1?
8x2-2x-3=0 so we can factor this and we have: (4x-3)(2x+1)=0 So either (4x-3)=0 and x=3/4 or (2x+1)=0 and x=-1/2 The answers are 3/4 or .75 or -1/2 or -.5
X squared plus 2x - 15 equals 0?
x2 + 2x - 15 = 0(x + 5) (x - 3) = 0x = -5x = +3
2x plus 5y equals 0 x - 5y equals -15?
(-5, 2)
What is the solution set of the quadratic equation 8x2 plus 2x plus 1 0?
There is no equals sign visible but, taking the equation to be8x2 + 2x + 1 = 0,the solutions are the complex conjugate pair, -1.25 ± 0.330719*i where i is the imaginary square root of -1.
2x2 plus 7x - 15 equals 0?
2x2 + 7x - 15 = 02x2 + 10x - 3x - 15 = 0(2x2 - 3x) + (10x - 15) = 0x(2x - 3) + 5(2x - 3) = 0(2x - 3)(x + 5) = 0(2x - 3) = 0 or (x + 5) = 0x = 3/2 or x = -5
