Write the quadratic equation whose roots are 5 and -1 and whose leading coefficient is 4

4x^2-16x-20

Step-by-step explanation:

(x-5)(x+1)=x^2-5x+x-5=x^2-4x-5

leading coefficient=4

which means that 4(x^2-4x-5)=4x^2-16x-20 is the answer.