Answer:
10= 8- 2
Step-by-step explanation:
10-8=2
10-2=8
If you had 10 icecream cones and want to eat at least 2 of them you would have 8. Unless you counted wrong. :)
Answer:
4
Step-by-step explanation:
Add 9 to both sides to form a perfect square trinomial:
x² + 6x = 7
x² + 6x + 9 = 16
x² + 2•x•3 + 3² = 16
(x + 3)² = 16
(recall that (a + b)² = a² + 2ab + b²)
Now solve for x. Taking square roots on both sides, we get
x + 3 = ± √16
x + 3 = ± 4
x = -3 ± 4
so the two solutions are x = -7 and x = 1.
Answer: 21
Step-by-step explanation: