1+9+25=35 not 41, this is a false statement
It is 2x2 - 7x + 9
2*2+4x-9=0 4x=9-4 4x=5 x=5/4
If 2x2 + 3x + 9 = 0 then x = -0.75 - 1.984i or -0.75 + 1.984i where i is the imaginary square root of -1.
It works out that the centre of the circle is at (-0.5, 1.5) and its diameter is the square root of 28
A = 4
1+9+25=35 not 41, this is a false statement
It is 2x2 - 7x + 9
The factorisation is as follows: 2x2 + 7x - 9 = (x - 1)(2x + 9).
2*2+4x-9=0 4x=9-4 4x=5 x=5/4
If 2x2 + 3x + 9 = 0 then x = -0.75 - 1.984i or -0.75 + 1.984i where i is the imaginary square root of -1.
2x2 + 17x - 9 = 2x2 + 18x - x - 9 = 2x(x + 9) - 1(x + 9) = (2x - 1)(x + 9)
It has two equal solutions for x which are x = 2 and x = 2
It works out that the centre of the circle is at (-0.5, 1.5) and its diameter is the square root of 28
2x2 - 9x = 18 2x2 - 9x -18 = 0 (2x - 18)(x + 9) x= -9 and 9
2x2 - 9x + 4 = (2x - 1)(x - 4)
The discriminant is 88.