Question

check whether
$x = - 3 \:$
is the root of quadratic equation
$x{2} + 4 = 13$
​

Answer 1

Answer:

HELLO DEAR !!

GUD NI8 ♥

X^2 + 4 = 13

X^2 = 13 - 4

X = √ 9

X = +3 , -3

SO -3 IS A ROOT OF THE EQUATION

HOPE IT HELPS :)

Answer 2

Answer:

yes it is right x=-3 but also x=3

Step-by-step explanation:

x²+4=13

x²=13-4

x²=9

x=plus minus of√9

x=plus minus of√3×√3

x=plus minus of 3