A quadratic trinomial about x such that the coefficient of the quadratic term is 2 and the constant term is 3. When x = 1, the value of this polynomial is 10 RT

A quadratic trinomial about x such that the coefficient of the quadratic term is 2 and the constant term is 3. When x = 1, the value of this polynomial is 10 RT

Let the quadratic trinomial be 2x ^ 2 + BX + 3
X = 1 is substituted into 2 × 1 + B × 1 + 3 = 10
b=5
That is, the quadratic trinomial is 2x ^ 2 + 5x + 3

If there is a polynomial whose quadratic term is coefficient 3, the coefficient of the first term is - 2, the constant term is - 4, and the letter is x, then the quadratic trinomial in this polynomial is

3x^2-2x-4

A quadratic trinomial expression with only the letter X, its coefficient of the quadratic term is - 1, the coefficient of the first term is - 1 / 2, and the constant term is - 3?

-x^2-x/2-3

In the shooting competition of the fun games, Xiaoqiang scores 10 shots, Xiaojie scores 2 more than Xiaozhang, and the three average 14 shots. How many shots does Xiaojie score?

Let Xiao Jie throw an x-ball, then Xiao Zhang throws (X-2) balls. According to the meaning of the question, we get x + X-2 + 10 = 3 × 14, and the solution is x = 17