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Factorise: 54x2 + 42x3 – 30x4

User Emed
by
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2 Answers

13 votes

Answer:

Check the attachment above

Factorise: 54x2 + 42x3 – 30x4-example-1
User Eshirima
by
9.0k points
6 votes

Answer:

Answer: (5 + 42x - 30x²)

Explanation:


{ \tt{ {5x}^(2) + {42x}^(3) - {30x}^(4) }}

» First factorise out x²:


= { \tt{ {x}^(2)(5 + 42x - 30 {x}^(2) )}}

» Then factorise the second bracket using quadratic knowledge:


{ \tt{ = {x}^(2)(5 + 42x - 30 {x}^(2) )}}

» The second bracket can not be factorised further because its roots/zeros are not whole numbers

User Sundrah
by
7.9k points
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