Q&A Find all the values of k so that the quadratic expression 3x^2 + kx - 8 factors into two binomials. Explain the process used to find the values.
Multiple choice If the length of three sides of \triangle ABC is a,b,c, such that when x=-\dfrac{1}{2}, the min value of quadratic function y=(a+b)x^2+2cx-(a-b) is -\dfrac{b}{2}, then \triangle ABC is a(n)
Multiple choice Suppose a quadratic functiony = (a-\dfrac{b}{2} )x^2-cx-a-\dfrac{b}{2} is constructed using three sides a,b,c of \triangle ACB, such that when x =1, the minimum value of the function is -\dfrac{8}{5}b , then \triangle ACB is a(n)