Explications étape par étape:
1)A=(1-5t)-(9t-5)
1)A=(1-5t)-(9t-5)=1-5t-9t+5
1)A=(1-5t)-(9t-5)=1-5t-9t+5=(1+5)+(-5t-9t)
1)A=(1-5t)-(9t-5)=1-5t-9t+5=(1+5)+(-5t-9t)=6-14t
1)A=(1-5t)-(9t-5)=1-5t-9t+5=(1+5)+(-5t-9t)=6-14tB=15y²(2/3y-1/3)
1)A=(1-5t)-(9t-5)=1-5t-9t+5=(1+5)+(-5t-9t)=6-14tB=15y²(2/3y-1/3)=15y²×2y-1/3
1)A=(1-5t)-(9t-5)=1-5t-9t+5=(1+5)+(-5t-9t)=6-14tB=15y²(2/3y-1/3)=15y²×2y-1/3=5y²(2y-1)
1)A=(1-5t)-(9t-5)=1-5t-9t+5=(1+5)+(-5t-9t)=6-14tB=15y²(2/3y-1/3)=15y²×2y-1/3=5y²(2y-1)C=(x-√3)(x²+√3)
1)A=(1-5t)-(9t-5)=1-5t-9t+5=(1+5)+(-5t-9t)=6-14tB=15y²(2/3y-1/3)=15y²×2y-1/3=5y²(2y-1)C=(x-√3)(x²+√3)=x³+√3x-√3x²-3
"j'espère que tu as compris"
