factorise 20x²-9x+1.
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20x² -9x +1=0
20x² - 4x -5x +1=0
4x(5x -1) -(5x -1)=0
(4x-1)(5x-1)=0
4x-1 =0. or. 5x-1=0
x=1/4. or. x = 1/5
20x² - 4x -5x +1=0
4x(5x -1) -(5x -1)=0
(4x-1)(5x-1)=0
4x-1 =0. or. 5x-1=0
x=1/4. or. x = 1/5
Aisha1363:
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Answer:
Step-by-step 20× sq. - 9x +1
20xsq. - 5x - 4x + 1
5x ( 4x - 1 ) -1 (4x - 1)
(5x - 1) ( 4x - 1 )
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