Soit x un nombre ratinnel. On donne: D=(2x-5)×(-3x+3)-20x+4x²+25 1) Développer et réduire D
2)Factoriser D
3)Calculer D pour x= -1/2​

correct answer:

b.(19,-2)

the 1st digit is in the 100s n its 1

step-by-step explanation:

3,589÷18 = 199.389

so the first digit of the quotient is in the 100s n its 1

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b