Question

Write down the each value of each expression for each value of x : a) x² + 3 b) 21 - 3x² c) 5(3x + 4)​

Answer 1

Answer:

a)+3i,-3i b)+√7, -√7 c)(-4) / 3

Answer 2

Answer:

a.) x= √-3

a.) x= √-3b.) x=√7

a.) x= √-3b.) x=√7c.) x= -4/3

Step-by-step explanation:

a.) let eqn equal to zero

let eqn equal to zero x^2+3=0

let eqn equal to zero x^2+3=0 x^2= -3

x=√ -3

b.) let eqn equal to zero

let eqn equal to zero 21–3x^2=0

let eqn equal to zero 21–3x^2=0 –3x^2 = –21

let eqn equal to zero 21–3x^2=0 –3x^2 = –21 x^2 = 7

x = √7

c.) let equation equal to 0

let equation equal to 0 5(3x+4)=0

let equation equal to 0 5(3x+4)=0 15x + 20=0

let equation equal to 0 5(3x+4)=0 15x + 20=0 15x = -20

x = -4/3

hope this will help you!!!