Answer:
x = ± 2
Step-by-step explanation:
Given
12 - x² = 0 ( add x² to both sides )
12 = x² or
x² = 12 ( take the square root of both sides )
x = ±
= ±
= ± 2
Answer:
45 ?
Step-by-step explanation:
4z>-60
divideby 4
z>-15
x+19 <=-5
subtract 19 from each side
x<= -24