Question

Find the value of a in the polynomial x² + ax - 30 if 5 is the zero of the given polynomial​

Answer 1

Answer:

a = 1

Step-by-step explanation:

25 + 5a - 30 = 0

5a = 5

a = 1

Answer 2

Answer:

Step-by-step explanation:

Answer : 1

Explanation :

Given 5 is zero of the polynomial

so if we put 5 in the equation, the equation must be equal to zero

Now, putting 5 at the place of x in given equation

we get,

(5)^2 + a(5) - 30 = 0

25 + 5a -30 = 0

5a - 5 = 0

5a = 5

a = 5/5

a = 1