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Luciem824
@Luciem824
April 2019
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Factoriser les expressions suivantes :
A= 49x² - 25
B= (x + 2)² - 64
C= 16x² - (2x-5)²
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nathalienouts
Identité remarquable a²-b² = (a+b)(a-b)
A= 49x² - 25
A = (7x)²-5²
A = (7x+5)(7x-5)
B= (x + 2)² - 64
B = (x+2)² - 8²
B= (x+2+8)(x+2-8)
B = (x+10)(x-6)
C= 16x² - (2x-5)²
C = (4x)²-(2x-5)²
C = (4x+2x-5)(4x-2x+5)
C = (6x-5)(2x+5)
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A= 49x² - 25
A = (7x)²-5²
A = (7x+5)(7x-5)
B= (x + 2)² - 64
B = (x+2)² - 8²
B= (x+2+8)(x+2-8)
B = (x+10)(x-6)
C= 16x² - (2x-5)²
C = (4x)²-(2x-5)²
C = (4x+2x-5)(4x-2x+5)
C = (6x-5)(2x+5)