Answer:1.5
Step-by-step explanation:10x=15
x=15/10
x=1.5
Answer:
x₁ = - 4 + √31
x₂ = - 4 - √31
Step-by-step explanation:
x² + 8x = 15
x² + 8x - 15 = 0
x = [- 8 ± √8² - 4×1×(-15)]/(2×1)
x = (-8 ± 2√31)/2
x₁ = (-8 ± 2√31)/2
3/4
pick 1,3,5 (reds) from 1,3,5,7(odd-numbered)
14b
2 * 7b
2*7 b