Question

What is a quartic function with only two real zeros at x = 7 and x = 13

A. y = (x - 10) ^ 5 - 81 OR y = x ^ 5 - 20x ^ 4 + 92x ^ 3 + 34x ^ 2 - 20x + 91

B. Y= (x - 10) ^ 4 - 81 OR y = x^4 - 20x +91

C. y = (x - 3) ^ 4 - 41 OR y = 2x ^ 4 - 21x ^ 3 + 52x ^ 2 - 17x + 609

D. y = (x+ 8)^4 + 71 OR y = x^4 - 3x^3 + 7x^2 - 5x + 13

Answer 1

Zeros be a and b

• a=7
• b=13

Function

`\\ \sf\longmapsto y=x^2-(a+b)x+ab`

`\\ \sf\longmapsto y=x^2-(7+13)x+(7)(13)`

`\\ \sf\longmapsto y=x^2-20x+91`

Option B