Question

One of the roots of equation x² + 5x + a = 0 is – 3. To find the value of a, fill in the boxes.

Since, `square` is a root of equation x² + 5x + a = 0

∴ Put x = `square` in the equation

⇒ `square^2 + 5 xx square + a` = 0

⇒ `square + square + a` = 0

⇒ `square + a` = 0

⇒ a = `square`

Answer 1

Since, – 3 is a root of equation x² + 5x + a = 0

∴ Put x = – 3 in the equation

⇒ – 3² + 5 × – 3 + a = 0

⇒ 9 + – 15 + a = 0

⇒ – 6 + a = 0

⇒ a = 6