Question

2) If the remainder obtained by dividing. 5x ^ 2 + mx + 15 by (x - 5) is 90 then find the value of m.​

Answer 1

Answer:

78

Step-by-step explanation:

The remainder obtained by dividing 5x² +mx + 15 by (x-5) is 90 the answer is 781-.23

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Answer 2

Given:

the remainder obtained by dividing 5x ^ 2 + mx + 15 by (x - 5) is 90

According to question we can write it as

Let f(x) = 5x² + mx + 15

x - 5

x = 5

When f(x) is divided by (x-5) the remainder is 90

This is the remainder theorem

f(5) = 5(5)² + m(5) + 15 = 90

5(25) + 5m + 15 = 90

125 + 5m = 90 - 15

125 +5m = 75

5m = 75 - 125

5m = - 50

m = -50/5

m = -10

Hence the value of m is -10