Evaluate
\left(7x-z\right)\left(x+4z\right)
Expand
7x^{2}+27xz-4z^{2}
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7x^{2}-xz+28zx-4z^{2}
Apply the distributive property by multiplying each term of x+4z by each term of 7x-z.
7x^{2}+27xz-4z^{2}
Combine -xz and 28zx to get 27xz.
7x^{2}-xz+28zx-4z^{2}
Apply the distributive property by multiplying each term of x+4z by each term of 7x-z.
7x^{2}+27xz-4z^{2}
Combine -xz and 28zx to get 27xz.
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