Question

X²-4x-21 spliting middle term method

Answer 1

$\huge\boxed{\underline{\bf { \red S \green O \pink L \blue U \orange T \purple I \red O \pink N \green{..}}}}$

$\longmapsto \sf {x}^{2} - 4x - 21$

$\longmapsto \sf {x}^{2} - 7x + 3x - 21$

$\longmapsto \sf x(x - 7) + 3(x - 7)$

$\longmapsto \sf(x + 3)(x - 7)$

Answer 2

Step-by-step explanation:

X2-4x-21

x2-7x-3x-21

x(x-7)-3(x-7)

(x-7) (x-3)

hope it help u...