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Laurine93320
@Laurine93320
April 2019
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Bonjour je dois développer et réduire :
A=(3x-4) x (7x-2) + (7x-10) au carré
Merci d'avance pour votre aide!
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maudmarine
Verified answer
A = (3x - 4) x (7x - 2) + (7x - 10)²
A = 21x² - 6x - 28x + 8 + 49x² - 140x + 100
A = 21x² + 49x² - 6x - 28x - 140x + 8 + 100
A = 70x² - 174x + 108
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ludi5109
A= (3x-4)*(7x-2)+(7x-10)²
A= 3x*7x+3x*(-2)-4*7x-4*(-2)+(7x²-2*7x*10+10²)
A= 21x²-6x-28x+8+49x²-140x+100
A=21x²+49x²-6x-28x-140x+8+100
A=70x²-174x+108
0 votes
Thanks 0
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Verified answer
A = (3x - 4) x (7x - 2) + (7x - 10)²A = 21x² - 6x - 28x + 8 + 49x² - 140x + 100
A = 21x² + 49x² - 6x - 28x - 140x + 8 + 100
A = 70x² - 174x + 108
A= 3x*7x+3x*(-2)-4*7x-4*(-2)+(7x²-2*7x*10+10²)
A= 21x²-6x-28x+8+49x²-140x+100
A=21x²+49x²-6x-28x-140x+8+100
A=70x²-174x+108