On considère l'expression D=(2x-7)^2-36x^2. 1) Développer et réduire D. 2) Factoriser D. 3) Résoudre l'équation (8x-7)(-7-4x)=0 . 4) Calculer la valeur exacte de D quand x=\sqrt{2} .

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer

this is a very good question

step-by-step explanation:

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10000

step-by-step explanation: divide by 2,