Question

Find the product for these questions

 1.( 2x ) ( 10x )

2.  -3m( m + 8 )

3. 4d( 2d -9 )

4. ( 3x + 4 ) ( x -2 )

5. ( 2y -1 ) ( 4y - 3 )

Answer 1

Solution 1 :

`(2x)(10x)`


`\boxed{= 20x^(2)}`

Solution 2 :

`-3m(m+8)`


`\boxed{= -3m^(2) - 24m}`

Solution 3 :

`4d(2d-9)`


`\boxed{= 8d^(2) -36d}`

Solution 4 :

`(3x+4)(x-2)`


`= 3x^(2) - 6x + 4x - 8`


`\boxed{= 3x^(2) - 2x - 8}`

Solution 5 :

`(2y-1)(4y-3)`


`= 8y^(2) -6y -4y + 3`


`\boxed{= 8y^(2) -10y + 3}`



Note :
Remember this formulas :

`a(b+c) = (a * b)+(a * c)`


`(a+b)(c+d)=(a * c)+(a * d)+(b * c)+(b * d)`

Answer 2

1.( 2x ) ( 10x ) = 20 x²

2. -3m( m + 8 ) = -3m² - 24m

3. 4d( 2d -9 ) = 8d² - 36d

4. ( 3x + 4 ) ( x -2 ) = 3x² - 6x + 4x - 8 = 3x² - 2x -8

5. ( 2y -1 ) ( 4y - 3 ) = 8y² - 6y - 4y + 3 = 8y² -10y +3