Question
Develloper et réduire les expression :
( 7-3x)( 9x-3)
( -2 -3y )(4-8y)
(4a+6)(-3-5a)
(5z-7)(8z-2)
( 7-3x)( 9x-3)
( -2 -3y )(4-8y)
(4a+6)(-3-5a)
(5z-7)(8z-2)
Asked by: USER2929
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121 Answers
Answer (121)
(7 - 3x) (9x - 3) =
7 X 9x + 7 X (- 3) - 3x X 9x - 3x X (- 3) =
63x - 21 - 27x² + 9x =
- 27x² + 72x - 21
(- 2 - 3y) (4 - 8y) =
- 2 X 4 - 2 X (- 8y) - 3y X 4 - 3y X (- 8y) =
- 8 + 16y - 12y + 24y² =
24y² + 4y - 8
(4a + 6) (- 3 - 5a) =
4a X (- 3) + 4a X (- 5a) + 6 X (- 3) + 6 X (- 5a) =
- 12a - 20a² - 18 - 30a =
- 20a² - 42a - 18
(5z - 7) (8z - 2) =
5z X 8z + 5z X (- 2) - 7 X 8z - 7 X (- 2) =
40z² - 10z - 56z + 14 =
40z² - 66z + 14
7 X 9x + 7 X (- 3) - 3x X 9x - 3x X (- 3) =
63x - 21 - 27x² + 9x =
- 27x² + 72x - 21
(- 2 - 3y) (4 - 8y) =
- 2 X 4 - 2 X (- 8y) - 3y X 4 - 3y X (- 8y) =
- 8 + 16y - 12y + 24y² =
24y² + 4y - 8
(4a + 6) (- 3 - 5a) =
4a X (- 3) + 4a X (- 5a) + 6 X (- 3) + 6 X (- 5a) =
- 12a - 20a² - 18 - 30a =
- 20a² - 42a - 18
(5z - 7) (8z - 2) =
5z X 8z + 5z X (- 2) - 7 X 8z - 7 X (- 2) =
40z² - 10z - 56z + 14 =
40z² - 66z + 14
( 7-3x)( 9x-3)
=63x-27x²-21+9x
=-27x²+72x-21
( -2 -3y )(4-8y)
=-8-12y+24y²+16y
=24y²+4y-8
(4a+6)(-3-5a)
=-12a-18-20a²-30a
=-20a²-42a-18
(5z-7)(8z-2)
=40z²-56z-10z+14
=40z²-66z+14
=63x-27x²-21+9x
=-27x²+72x-21
( -2 -3y )(4-8y)
=-8-12y+24y²+16y
=24y²+4y-8
(4a+6)(-3-5a)
=-12a-18-20a²-30a
=-20a²-42a-18
(5z-7)(8z-2)
=40z²-56z-10z+14
=40z²-66z+14