Advertisements
Advertisements
प्रश्न
From the sum of 4 + 3x and 5 - 4x + 2x2, subtract the sum of 3x2 - 5x and -x2 + 2x + 5.
Advertisements
उत्तर
(4 + 3x) + (5 - 4x + 2x2) = 4 + 3x + 5 - 4x + 2x2
= 3x - 4x + 2x2 + 4 + 5
= -x + 2x2 + 9
(3x2 - 5x) + (- x2 + 2x + 5) = 3x2 - 5x - x2 + 2x + 5
= 3x2 - x2 - 5x + 2x + 5
= 2x2 - 3x + 5
(-x + 2x2 + 9) - (2x2 - 3x + 5)
= -x + 2x2 + 9 - 2x2 + 3x - 5
= -x + 3x + 2x2 - 2x2 + 9 - 5
= 2x + 4
संबंधित प्रश्न
Add: -7mn + 5, 12mn + 2, 9mn - 8, -2mn - 3
What should be added to x2 + xy + y2 to obtain 2x2 + 3xy?
Add the following algebraic expression:
4xy2 − 7x2y, 12x2y − 6xy2, − 3x2y +5xy2
If \[x + \frac{1}{x} = 9,\] find the value of \[x^4 + \frac{1}{x^4} .\]
Add:
17a2b2 + 16c; 28c − 28a2b2
The addition of 3mn, – 5mn, 8mn and – 4mn is
Add the following expressions:
x3 – x2y – xy2 – y3 and x3 – 2x2y + 3xy2 + 4y
Add the following expressions:
ab + bc + ca and – bc – ca – ab
Each symbol given below represents an algebraic expression:
= 2x2 + 3y, 
= 5x2 + 3x, 
= 8y2 – 3x2 + 2x + 3y
The symbols are then represented in the expression:
Find the expression which is represented by the above symbols.
At age of 2 years, a cat or a dog is considered 24 “human” years old. Each year, after age 2 is equivalent to 4 “human” years. Fill in the expression [24 + 
(a – 2)] so that it represents the age of a cat or dog in human years. Also, you need to determine for what ‘a’ stands for. Copy the chart and use your expression to complete it.
| Age | [24 +  (a – 2)] |
Age (Human Years) |
| 2 | ||
| 3 | ||
| 4 | ||
| 5 | ||
| 6 |
