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प्रश्न
What should be added to x2 + xy + y2 to obtain 2x2 + 3xy?
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उत्तर
Let a be the required term.
a + (x2 + y2 + xy) = 2x2 + 3xy
a = 2x2 + 3xy - (x2 + y2 + xy)
a = 2x2 + 3xy - x2 - y2 - xy
a = 2x2 - x2 - y2 + 3xy - xy
= x2 - y2 + 2xy
संबंधित प्रश्न
Simplify combining like terms: - z2 + 13z2 − 5z + 7z3 − 15z
Add: 14x + 10y - 12xy - 13, 18 - 7x - 10y + 8xy, 4xy
Add: ab - 4a, 4b - ab, 4a - 4b
Subtract: a (b - 5) from b (5 - a)
Add:
2a + 6b + 8c; 16a + 13c + 18b
Add: 8x, 3x
Add:
5x2 – 3xy + 4y2 – 9, 7y2 + 5xy – 2x2 + 13
Add the following expressions:
p2 – q + r, q2 – r + p and r2 – p + q
Add the following expressions:
a2 + 3ab – bc, b2 + 3bc – ca and c2 + 3ca – ab
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 |
