bonjour
Calcul Littéral développer et réduire
A savoir par cœur identité remarquable :
(a + b)^2 = a^2 + 2ab + b^2
(a - b)^2 = a^2 - 2ab + b^2
(a - b)(a + b) = a^2 - b^2
A = 12x² + (4x + 5)²
A = 12x^2 + (4x)^2 + 2 * 4x * 5 + 5^2
A = 12x^2 + 16x^2 + 40x + 25
A = 28x^2 + 40x + 25
B= 7x - (6x + 2)²
B = 7x - [(6x)^2 + 2 * 6x * 2 + 2^2]
B = 7x - 36x^2 - 24x - 4
B = -36x^2 - 17x - 4
C = -16x² - (4x - 1) (4x + 1)
C = -16x^2 - [(4x)^2 - 1^2]
c = -16x^2 - 16x^2 + 1
C = -32x^2 + 1
D= (6x - 4)² + (2x - 6)²
D = 36x^2 - 48x + 16 + 4x^2 - 24x + 36
D = 40x^2 - 72x + 52