Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9th
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If (x + 5) and (x – 3) are the factors of ax2 + bx + c, then values of a, b and c are - Mathematics

MCQ

If (x + 5) and (x – 3) are the factors of ax2 + bx + c, then values of a, b and c are

Options

  • 1, 2, 3

  • 1, 2, 15

  • 1, 2, −15

  • 1, −2, 15

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Solution

1, 2, −15

Explanation;

Hint:

(x + 5)(x – 3) = x2 + (5 – 3)x + (5)(−3)

= x2 + 2x – 15

compare with ax2 + bx + c

a = 1, b = 2 and c = −15

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APPEARS IN

Samacheer Kalvi Mathematics Class 9th Tamil Nadu State Board
Chapter 3 Algebra
Exercise 3.15 | Q 15 | Page 135
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