Write a quadratic trinomial about X, such that the coefficient of the quadratic term is 2, the constant term is - 3, and when x = - 1, the value of the polynomial is 5
Let this quadratic trinomial be: 2x & sup2; + bx-3
Then when x = - 1, the value of the formula is 5, that is: 2 × (- 1) & sup2; + B × (- 1) - 3 = 5
2-b-3=5,b=-6
The quadratic trinomial satisfying the requirements is: 2x & sup2; - 6x-3
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