Y = 3X^2 + 18X + 15
set to zero
3X^2 + 18X + 15 = 0
divide through by 3
X^2 + 6X + 5 = 0
now easy factor by inspection
(X + 1)(X + 5)
X = -1
X = -5
-1 checks by inspection and I assume -5 will check also
(x+3)(x+15)
-3*6x+5/8=6x-1 * (-3*(6x+5))/8?If this is your question, then:LHS = -3 * 6x + 5/8 = -18x + 5/8RHS = 6x - 1 * (-18x-15)/8 = 6x + (18x+15)/8 = 48x/8 + 18x/8 + 15/8 = 66x/8 + 15/8-18x + 5/8 = 66x/8 + 15/866x/8 + 18x = 15/8 - 5/8210x/8 = 10/8210x = 10x = 10/210 = 1/21
x2 + 18x + 45 = (x + 15)(x + 3).
(x-3)(x-5) = 0
It equals 285
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(x+3)(x+15)
-3*6x+5/8=6x-1 * (-3*(6x+5))/8?If this is your question, then:LHS = -3 * 6x + 5/8 = -18x + 5/8RHS = 6x - 1 * (-18x-15)/8 = 6x + (18x+15)/8 = 48x/8 + 18x/8 + 15/8 = 66x/8 + 15/8-18x + 5/8 = 66x/8 + 15/866x/8 + 18x = 15/8 - 5/8210x/8 = 10/8210x = 10x = 10/210 = 1/21
x2 + 18x + 45 = (x + 15)(x + 3).
(x-3)(x-5) = 0
15 to the 2nd power or 15 squared equals 15 * 15 which equals 225.
The answer to 5 squared plus 10 is found by squaring 5 (or multiplying it by itself, e.g. 5 * 5) which equals 25, and then adding 10 giving us 35. Therefore 5 squared plus ten = 35
x2 + 2x - 15 = 0(x + 5) (x - 3) = 0x = -5x = +3
15
It equals 285
12x2 - 28x - 15= 12x2 - 18x - 10x - 15= 6x(2x - 3) - 5(2x - 3)= (6x - 5)(2x - 3)
x2+x-15 = 0 Using the quadratic equation formula: x = 3.405124838 or x = -4.405124838