Question

factorisation method
$21x = 196 - {x}^{2}$

Answer 1

Hey,
$x^{2} + 21x - 196 = 0$
$x ^{2} + (28x - 7x) - 196 = 0$
$( {x}^{2} + 28x) - (7x - 196) = 0$
$x(x + 28) - 7(x + 28) = 0$
$(x - 7)(x + 28) = 0$


$x = 7$
and
$x = ( - 28)$
Hope it helps u..... :))
Plz mark it as brainliest. ...

Answer 2

Step-by-step explanation:

ᴛʜɪs ɪs ʏᴏᴜʀ ᴀɴsᴡᴇʀ.......