One method is called the ac method:-

For example factor

3x^2 + 2x - 21

ac ( first coefficient times the last) = 3*21 = -63

now we need to find 2 factors of -63 which add up to the coefficient of x ( + 2):-

+9 and - 7 look good so we can write the original expression as:-

3x^2 + 9x - 7x - 21

Factor by grouping:-

= 3x(x +3) - 7(x + 3) ( x + 3) is common so:-

= (3x - 7)(x + 3) Answer

7 0

3 years ago

The rectangular solid has a mass of 3,300 grams.

ZanzabumX [31]

Answer:

0.22 grams per cm^3 is your answer, Hopes this helps

Step-by-step explanation:

50x10x30=15000 Cm^3

3300/15000= 0.22 g/cm^3

3 0

2 years ago

Give two examples that show using parentheses can change

Grace [21]

X=2
-x^2=-2^2=4
-(x)^2=-(2)^2=-4

3(X+5)=3X+15
3 x X+5=3X=5

8 0

3 years ago

Let f (x) = x^2 + 3x + 2, and g (x) x - 6. Find and simplify: (f • g) (x)

Igoryamba

Answer:

(f • g) (x) = $x^{3}$ - 3 $x^{2}$ - 16x - 12

Step-by-step explanation:

(x-6)( $x^{2}$ + 3x + 2)

$x^{3}$ + 3 $x^{2}$ + 2x - 6 $x^{2}$ - 18x -12

$x^{3}$ - 3 $x^{2}$ - 16x - 12

4 0

2 years ago

Give the difference of (7.2 x 10-7) - (4.5 x 10-7) ​

Give the difference of (7.2 x 10-7) - (4.5 x 10-7)