0
X2+0X - 2.25=0
1.= Both sides by 2.25
X2+0X=2.25
2. Subtract both sides by 0X
X2=2.25
3. Square root both sides
X=1.5
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∙ 11y ago
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Why does x equal to 8 and 0 in x2 equals 8x?
x2 = 8xx2- 8x = 0x(x - 8) = 0x = 0 ;x - 8 = 0x = 8
What are the roots of the quadratic equation x2 - 14x plus 45 equals 0?
x2-14x+45=0(x-9)(x-5)=0x-9=0 & x-5=0x=9 & x=5
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-18
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y = 2x - x2y = 0Since both quantities on the right side are equal to 'y', they're equal to each other.2x - x2 = 0x (2 - x) = 0x = 0and2 - x = 0x = 2The two points of intersection are (0, 0) and (2, 0) .
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x2 - 5x = 0x (x - 5) = 0x = 0andx = 5
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x2 = 8xx2- 8x = 0x(x - 8) = 0x = 0 ;x - 8 = 0x = 8
What are the roots of the quadratic equation x2 - 14x plus 45 equals 0?
x2-14x+45=0(x-9)(x-5)=0x-9=0 & x-5=0x=9 & x=5
What is x squared plus 12x plus 36 equals?
x2 + 12x + 36 = 0(x + 6) (x + 6) = 0x+ 6=0 ;x + 6 = 0x = -6 ; x = -6
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x2-7x+12 = 0 (x-3)(x-4) = 0x=3,4
X2 plus 3x plus 3 equals 7?
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X2-x plus 3 equals 0?
x2 - x + 3 = 0x = [1 +/- sqrt(1-12)]/2 = [1 +/- i*sqrt(11)]/2 where i is the imaginary square root of -1.
X squared plus 2x - 15 equals 0?
x2 + 2x - 15 = 0(x + 5) (x - 3) = 0x = -5x = +3
X squared minus 5x equals 0?
x2 - 5x = 0Factor the left side:x (x - 5) = 0x = 0x = 5
What X2 plus 7x minus 120 equals 0?
Factorise: (x - 8)( x + 15) = 0x - 8 = 0 or x + 15 = 0, so x = 8 or -15Check: 64 + 56 = 120 OK; 225 - 105 = 120 OKJob done.
X squared-7x plus 6 equals 0?
x2 - 7x + 6 = 0(x - 6)(x - 1) = 0x = 6, x = 1
