Classify the following into monomials, binomials, and trinomials:
a – b, –9, 10y, 61 + 5m, 5xy2, a – b + c, a + 5, x2y + xy2 – xy, –3xy, 7 – 3xyz
3. Add: 7x2 – 4x + 5 and 9x - 10
4. Add: 7xy + 5yz – 3zx; 4yz + 9zx – 4y and –3xz + 5x – 2xy
5. Subtract: 5x2 – 4y2 + 6y – 3 from 7x2 – 4xy + 8y2 + 5x – 3y
Find 4x x 5y x 7z. First find 4x x 5y and multiply it by 7z; or first find 5y x 7z and multiply it by 4x. Is the result the same? What do you observe? Does the order in which you carry out the multiplication matter?
Find the product of the following pairs of monomials.
-4p, 7pq
-4p and 7pq
- 4p C 7pq = (-4 x 7) x p x qp = -28 x p2q = -28p2q