Question

hey guys here is some questions ♥♥

1. factories

${ - 4a}^{2} + 4ab - 4ca$
$z - 7 + 7xy z$
do this open challenge

love you

Answer 1

4a2 = 2 × 2 × a × a

4ab = 2 × 2 × a × b

4ca = 2 × 2 × c × a

∴ −4a2 + 4ab − 4ca 

= − (2 × 2 × a × a) + (2 × 2 × a × b) − (2 × 2 × c× a)

= 2 × 2 × a [− (a) + b − c]

= 4a (−a + b − c)