Question

Factorise: 5x2 – 15x – 20.

Answer 1

$\huge{\underline{\mathfrak{Solution:}}}$




∴ 5x² – 15x – 20

⇒ 5(x² – 3x – 4)

⇒ 5(x² – 4x + x – 4)

⇒ 5{x(x - 4) +1(x - 4)}

⇒ 5(x - 4)(x + 1)

Answer 2

5x^2 -15x -20

5x^2-20X+5x-20

=5x(x-4)+5(x-4)

=(5x+5)(x-4)

=5(x+1)(x-4)

hope it helps you।।।