Answer:
31
Step-by-step explanation:
Given
x² + 5x - 3 = 0
with a = 1, b = 5, c= - 3 , then
sum of roots x₁ + x₂ = - = - = - 5
product of roots = = = - 3
Now
(x₁ + x₂)² = x₁² + 2x₁x₂ + x₂² , that is
(- 5)² = x₁² + 2(- 3) + x₂²
25 = x₁² - 6 + x₂² ( add 6 to both sides ), then
x₁² + x₂² = 31
That is has root -12 meaning if you replace x with -12 you get 0.
16 is 40 because you just need to add 16 to 14 and to 10 which is equal 40
Answer: its <
The 11 foot boat ways 187 pounds
102 / 6 = 17
17 * 11 = 187
