Question
Factoriser ces expressions:
Q= x(au carré)-16
R=1-y(au carré)
S=100x(au carré)-9
T=36-81x(au carré)
Q= x(au carré)-16
R=1-y(au carré)
S=100x(au carré)-9
T=36-81x(au carré)
Asked by: USER3647
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133 Answers
Answer (133)
Bonjour,
Réponse :
Exercice sur l'indentité remarquable suivante :
a² - b² = (a + b)(a - b)
Q = x² - 16
= x² - 4x
= (x + 4)(x - 4)
R = 1 - y²
= 1² - y²
= (1 + y)(1 - y)
S = 100x² - 9
= (10x)² - 3²
= (10x + 3)(10x - 3)
T = 36 - 81x²
= 6² - (9x)²
= (6 + 9x)(6 - 9x)