1.) 3x-2x^2=7
2.)5-2x^2=6x
3.)(x+3)(x+4)=0
4.)(2x+7)(x+4)=0
5.)2x(x-3)=15
plss help
We want the form ax^2 + bx + c = 0
1. 3x - 2x^2 = 7 re-write as
-2x^2 + 3x - 7 = 0
a = -2, b = 3, c = -7
2. 5 - 2x^2 = 6x re-write as
-2x^2 - 6x + 5 = 0
a = -2, b = -6, c = 5
3. (x + 3) ( x + 4) = 0 expand as
x^2 + 3x + 4x + 12 = 0
x^2 + 7x + 12 = 0
a =1. b = 7, c = 12
4. (2x + 7) ( x+ 4) = 0 expand as
2x^2 + 7x + 8x + 28 = 0
2x^2 + 15x + 28 = 0
a = 2, b = 15, c = 28
5. 2x ( x - 3) = 15
2x^2 - 6x = 15
2x^2 - 6x - 15 = 0
a = 2, b = -6, -15
and there's more
1.)(x+7)(x-7)=-3x
2.)(x-4)^2+8=0
3.)(x+2)^2=3(x+2)
4.)(2x-1)^2=(x+1)^2
5.)2x(x+4)=(x-3)(x-3)
thank you cphill god bless you
1. (x + 7) ( x - 7) = -3x
x^2 - 49 = -3x
x^2 + 3x - 49 = 0
a = 1, b = 3, c = -49
2. (x - 4)^2 + 8 = 0
(x - 4) ( x- 4) + 8 =0
x^2 - 4x - 4x + 16 + 8 =0
x^2 - 8x + 24 = 0
a = 1, b = -8, c = 24
3. ( x + 2 )^2 = 3 ( x + 2)
(x + 2)^2 - 3 (x + 2 ) = 0
(x + 2) ( x + 2) - 3(x + 2) = 0
x^2 + 2x + 2x + 4 - 3x - 6 = 0
x^2 + 4x + 4 - 3x - 6 = 0
x^2 + x - 2 = 0
a = 1, b = 1, c = -2
4. (2x + 7) ( x + 4) = 0
2x^2 + 7x + 8x + 28 = 0
2x^2 + 15x + 28 = 0
a = 2 , b = 15, c = 28
5. 2x( x + 4) = (x -3) ( x - 3)
2x^2 + 8x - (x - 3) ( x - 3) = 0
2x^2 + 8x - [ x^2 - 6x + 9 ] = 0
2x^2 + 8x - x^2 + 6x - 9 = 0
x^2 + 14x - 9 = 0
a = 1, b = 14, c = -9