Factoriser Q(x)= 49 - (x+2) ^2 R(x) = x^2 - 25 + 2 ( x - 5) (x + 3 )
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Question
Factoriser
Q(x)= 49 - (x+2) ^2
R(x) = x^2 - 25 + 2 ( x - 5) (x + 3 )
Q(x)= 49 - (x+2) ^2
R(x) = x^2 - 25 + 2 ( x - 5) (x + 3 )
1 Réponse
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1. Réponse Anonyme
49 - (x + 2)²
= 7² - (x + 2)²
= (7 - x - 2)(7 + x + 2)
= (- x + 5)(x + 9)
x² - 25 + 2(x - 5)(x + 3)
= (x + 5)(x - 5) + (x - 5)(2x + 6)
= (x - 5)(x + 5 + 2x + 6)
= (x - 5)(3x + 11)