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7/23/2013 2:32:16 AM
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3xz + (5x + 3z)(7x – 2xz + y – 4z) Multipliation of brackets first. Multiply the first term of the first bracket with each of the term of the second and then repeat for the second term of the first bracket. So... 3xz + (35x2 - 10x2z = 5xy - 20xz +21 xz - 6xz2 +3yz - 12z2) Now add. 35x2 - 10x2z + 5xy + (3xz - 20xz +21xz) - 6xz2 + 3yz - 12z2 [i]-(3xz-20xz+21xz) = 4xz[/i] 35x2 - 10x2z + 5xy + 4xz + 3yz - 6xz2 -12z2
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