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9zsqrt8z-3sqrt2z^3?

how do i begin this problem?

2007-09-04 08:16:22 · 1 answers · asked by qt123 1 in Science & Mathematics ➔ Mathematics

1 answers

9z*sqrt(8z) - 3sqrt(2z^3)
= 9z *2sqrt(2z) - 3z*sqrt(2z)
=6z*sqrt(2z)

Note sqrt(8z) = sqrt(4)*sqrt(2z) = 2sqrt(2z), and,
sqrt(2z^3) = sqrt(z^2) *sqrt(2z) = z*sqrt(2z)

2007-09-04 08:27:43 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋

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