fact the following polynomial
1)3x²-6x
2)9x²-25
3)x³+125
4)x²-20x + 100
5)x² + 6x + 5
6)2x² + 7x + 5
with solution po sana
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fact the following polynomial
1)3x²-6x
2)9x²-25
3)x³+125
4)x²-20x + 100
5)x² + 6x + 5
6)2x² + 7x + 5
with solution po sana
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1. 3× ×(×-2)
2. (3×)² - 5²
(3×-5)×(3×+5)
3. ׳+5³
(×+5)×(ײ-× ×5+5²)
(×+5)+(ײ-5×+25)
4. (×-10)²
5. ײ+5×+×+5
× ×(×+5)+×+5
(×+5)×(×+1)
6. 2ײ+5×+2×+5
× ×(2×+5)+2×+5
(2×+5)×(×+1)
1. ) 3x( x - 2 )
solution:
3x² = (3) (x)(x)
-6x = (3)(-2)(x)
the greatest common factor is 3x.
ANSWER = 3x( x - 2 )
2. ) ( 3x-5 )( 3x +5 )
solution
the square roots of 9x² is 3x
the square roots of -25 is -5 and 5
( 3x-5 )( 3x +5 )
ANSWER = ( 3x-5 )( 3x +5 )
3. ) ( x + 5 )( x²-5x+25 )
solution
the cube root of x³ is x
the cube root of 125 is 5
( x + 5 )
(x)(x) = x²
(5)(x) = 5x
change the 5x to -5x
the answer is -5x
(5)(5) = 25
ANSWER = ( x + 5 )( x²-5x+25 )
4. ) ( x - 10 )²
solution
the square root of x² is x
100
times
(-10)(-10) = 100
Add or Sub
-10(-10) = -20
ANSWER = ( x - 10 )²
5. ) ( x + 5 )( x + 1 )
solution
the square root of x² is x
times
5 x 1 = 5
Add or Sub
5 + 1 = 6
ANSWER = ( x + 5 )( x + 1 )
6. ) ( 2x + 5 )( x + 1 )
solution
2x² = 2x(x)
5 = 5(1)
try to use foil method to check or trial and error
( 2x + 1 )( x + 5 )
2x(x) = 2x²
1(x) = x
5(2x) = 7x
7x + x = 8x
5 x 1 = 5
so this answer is wrong and try another arrangements
2x² + 8x + 5
( 2x + 5 )( x + 1 )
2x(x) = 2x²
5(x) = 5x
1(2x) = 2x
5x + 2x = 7x
5 x 1 = 5
this is correct
2x² + 7x + 5
ANSWER = ( 2x + 5 )( x + 1 )
- PANDA 8840
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- PANDA 8840