Math  /  Algebra

QuestionEx18: Factoriser les expressions suivantes :
1. x225x^{2}-25
2. 64x2164 x^{2}-1
3. 16x23616 x^{2}-36
4. 16x2+16x+416 x^{2}+16 x+4

Studdy Solution
Reconnaître que 16x2+16x+416 x^2 + 16 x + 4 est un trinôme carré parfait.
16x2+16x+4=(4x+2)2 16 x^2 + 16 x + 4 = (4x + 2)^2
Solution:
1. x225=(x5)(x+5)x^2 - 25 = (x - 5)(x + 5)
2. 64x21=(8x1)(8x+1)64 x^2 - 1 = (8x - 1)(8x + 1)
3. 16x236=(4x6)(4x+6)16 x^2 - 36 = (4x - 6)(4x + 6)
4. 16x2+16x+4=(4x+2)216 x^2 + 16 x + 4 = (4x + 2)^2

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