Grade 9 · Math
Multiply two monomials practice
Multiply coefficients and use the product rule for exponents.
Opening your practice adventure…
Try a sample
Simplify (5x5)(4x3).
- 20x8
- 20x9
- 20x7
- 21x8
See the answer & why
20x8
Multiply the coefficients: 5 × 4 = 20. Add exponents of x: 5+3 = 8. The product is 20x8.
A little hint: Products of powers with the same base add their exponents.
A teaching tip
Keep coefficient multiplication separate from adding exponents.