4x to the 3rd power -4x to the 2nd power -43 when x=3
-66.
- 3X - (- 4X) is the same as - 3X + 4X X(- 3 + 4) that is all the factoring needed there
2x/3=x/2+20 (2x/3=x/2+20)6 4x=3x+120 4x-3x=120 x=120
Assuming you mean 12x2 - 5x - 2, use the reverse FOIL method. But, first, multiply the two end number together (12 * -2 = -24). Then find two numbers whose product is -24 and sum is -5. These two numbers are 3 and -8.3 * ( -8 ) = -24 and 3x + ( -8x ) = -5xNext, we use those factors found in the previous step and group them together.12x2 - 5x - 212x2 + 3x - 8x -2( 12x2 + 3x ) ( -8x - 2 )Next, take out the common factors from each group( 12x2 + 3x ) ( -8x - 2 )3x ( 4x + 1 ) - 2 ( 4x + 1 )Lastly, group the two ungrouped terms multiplied by their common factor ( 4x + 1 )3x ( 4x + 1 ) - 2 ( 4x + 1 )( 3x - 2 ) ( 4x + 1 )Next, we check the work by usingthe FOIL method.( 3x - 2 ) ( 4x + 1 )F ... 3x * 4x = 12x2O ... 3x * 1 = 3xI ... -2 * 4x = -8xL ... -2 * 1 = -212x2 + 3x - 8x - 2Combine like terms12x2 - 5x - 2
(4x ^2 + 3) + (3x ^2 + 8) = ( 4x^2 + 3x^2 ) + (3+8) = 7x^2 + 11
4x to the 3rd power -4x to the 2nd power -43 when x=3
5+4x-7=4x+3-1x 4x-2=3x+3 (combined the like terms) +2 +2 (add 2 to both sides) 4x=3x+5 -3x -3x (subtract 3x from both sides) x+5
5+4x-7 = 4x+3-x 4x-2 = 3x+3 4x-3x = 3+2 x = 5
5x-2x-3x+4x = (5-2-3+4)x = 4x
(3x+2)-(5+7x) = 3x+2-5-7x = -4x-3 3x+2 is -4x-3 times greater than 5+7x.
-14 = 3x + (x-2)-14 = 3x + x -2-14 = 4x -2-12 = 4x-3 = x
The 3x is cubed and the 4x is squared
7x - 2 = 4x + 9 3x - 2 = 9 3x = 11 x = 11/3
16x^2 - 9
-66.
- 3X - (- 4X) is the same as - 3X + 4X X(- 3 + 4) that is all the factoring needed there