Question

factorise using middle term factor msquare + 10m - 600

Answer 1

= m² +10m -600
= m² +30m -20m -600
= m(m + 30) × -20(m + 30)
= (m + 30) (m -20)

Answer 2

Answer:

m = 20 or m = -30

Step-by-step explanation:

m2 + 10m - 600 = 0

⇒ m2 + 30m - 20m -600 = 0

⇒ m ( m + 30 ) - 20 ( m + 30 ) = 0

⇒ ( m - 20 ) (m + 30 ) = 0

⇒ m - 20 = 0 or m + 30 = 0

⇒ m = 20 or m = -30