The equation has two roots. What is the sum of the squares of the roots?
Answer and explanation
Correct answer: C.
- Step 1: For roots : and . Step 2. . **Answer: . Why not the others:** squares the sum without subtracting ; gives the sum of the roots; gives the product of the roots.
Practise more Number, Algebra, Data Sufficiency and Probability.
Free questions with an explanation for every one, and full timed Högskoleprovet (Sweden) mock tests.
More Number, Algebra, Data Sufficiency and Probability questions
- A jacket costs 800 kr. During a sale its price is reduced by 25%. What is the sale price?
- Solve the equation .
- What is the next number in the sequence 3, 7, 11, 15, ... ?
- A train travels 240 km in 3 hours at a constant speed. How far does it travel in 5 hours at the same speed?
- What is the mean of the numbers 4, 8, 9 and 15?
- A rectangle has an area of 48 cm and a width of 6 cm. What is its perimeter?