Réponse :
Explications étape par étape
Bonjour,
Développer et réduire les expressions suivantes :
(i+j) x (k+l)
= i x k + i x l + j x k + j x l
= ik + il + jk + jl
(a+2) x (c+7)
= a x c + a x 7 + 2 x c + 2 x 7
= ac + 7a + 2c + 14
(2x +3) * (6+y)
= 2x * 6 + 2x * y + 3 * 6 + 3 * y
= 12x + 2xy + 18 + 3y
(3+7) (5k+2,2) =
= 3 x 5k + 3 x 2.2 + 7 x 5k + 7 x 2.2
= 15k + 6.6 + 35k + 15.4
= 50k + 22
(r+2k) x (8+q) =
= r x 8 + r x q + 2k x 8 + 2k x q
= 8r + rq + 16k + 2kq
(4x +2) * (7-y) =
= 4x * 7 + 4x * (-y) + 2 * 7 + 2 * (-y)
= 28x - 4xy + 14 - 2y
(3a - 2) x (6b - 0,5)=
= 3a x 6b + 3a x (-0.5) - 2 x 6b - 2 x (-0.5)
= 18ab - 1.5a - 12b + 1
(0,5 + x) * (x + 8) =
= 0.5 * x + 0.5 * 8 + x * x + x * 8
= 0.5x + 4 + x² + 8x
= x² + 8.5x + 4
(x -1) (x² + 4) =
= x * x² + x * 4 - 1 * x² - 1 * 4
= x³ + 4x - x² - 4
= x³ - x² + 4x - 4
(x²- 3) (- x -2) =
= x² * (-x) + x² * (-2) - 3 * (-x) - 3 * (-2)
= -x³ - 2x² + 3x + 6
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
Réponse :
Explications étape par étape
Bonjour,
Développer et réduire les expressions suivantes :
(i+j) x (k+l)
= i x k + i x l + j x k + j x l
= ik + il + jk + jl
(a+2) x (c+7)
= a x c + a x 7 + 2 x c + 2 x 7
= ac + 7a + 2c + 14
(2x +3) * (6+y)
= 2x * 6 + 2x * y + 3 * 6 + 3 * y
= 12x + 2xy + 18 + 3y
(3+7) (5k+2,2) =
= 3 x 5k + 3 x 2.2 + 7 x 5k + 7 x 2.2
= 15k + 6.6 + 35k + 15.4
= 50k + 22
(r+2k) x (8+q) =
= r x 8 + r x q + 2k x 8 + 2k x q
= 8r + rq + 16k + 2kq
(4x +2) * (7-y) =
= 4x * 7 + 4x * (-y) + 2 * 7 + 2 * (-y)
= 28x - 4xy + 14 - 2y
(3a - 2) x (6b - 0,5)=
= 3a x 6b + 3a x (-0.5) - 2 x 6b - 2 x (-0.5)
= 18ab - 1.5a - 12b + 1
(0,5 + x) * (x + 8) =
= 0.5 * x + 0.5 * 8 + x * x + x * 8
= 0.5x + 4 + x² + 8x
= x² + 8.5x + 4
(x -1) (x² + 4) =
= x * x² + x * 4 - 1 * x² - 1 * 4
= x³ + 4x - x² - 4
= x³ - x² + 4x - 4
(x²- 3) (- x -2) =
= x² * (-x) + x² * (-2) - 3 * (-x) - 3 * (-2)
= -x³ - 2x² + 3x + 6