Advertisements
Advertisements
Question
Find the sum of: x2 + x – 2, 2x – 3x2 + 5 and 2x2 – 5x + 7
Advertisements
Solution
x2 + x – 2, 2x – 3x2 + 5 and 2x2 – 5x + 7
= x2 + x – 2 + 2x – 3x2 + 5 + 2x2 – 5x + 7
= x2 - 3x2 + 2x2 + x + 2x - 5x - 2 + 5 + 7
= 3x2 - 3x2 + 3x - 5x - 2 + 12
= 0 - 2x + 10
= - 2x + 10
APPEARS IN
RELATED QUESTIONS
Identify the numerical coefficient of term (other than constant) in the following expression:
5 − 3t2
Write the coefficient of: 15 in – 15p2
Fill in the blank:
4a + 3b – 7a + 4b = _____
Fill in the blank:
16x2 – 9x2 = and 25xy2 – 17xy2 = _______.
Add : - 9x, 3x and 4x
Add : 18pq – 15pq and 3pq
Find the sum of: 4x3 + 2x2 – x + 1, 2x3 – 5x2 – 3x + 6, x2 + 8 and 5x3 – 7x
The numerical co-efficient of the term −xy is __________
Write the coefficient of x2 in the following:
x3 – 2x2 + 3x + 1
Observe the following nutritional chart carefully:
| Food Item (Per Unit = 100g) | Carbohydrates |
| Rajma | 60g |
| Cabbage | 5g |
| Potato | 22g |
| Carrot | 11g |
| Tomato | 4g |
| Apples | 14g |
Write an algebraic expression for the amount of carbohydrates (in grams) for 2x units tomatoes and y units apples.
