C. Challenge yourself by factoring the following expressions completely. Write yo answer in the space provided below each number. 21. 4x10nn - 20x5n³n 23. 5x(y-6z) + 10x²(6z - y) 22. 7(r-2s) - rx + 2x 24. (25ax - 15ay²) + (3y² - 5x) help me
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