xsquare -3x-2 solve it
Answers
[ here, the first thing is to find the militon factor of the middle term i.e. 3x by spliting ]
[ to find the militon factor of 3x take the first and the last digits ]
[ here, we donot count x² as digit so instead take 1 ]
[ first no. × second no. ]
1 × 2
[ now, in militon factor, the number which is formed i.e. 1 × 2, we need to take this number either by addition or by subtraction (according to the middle term) , here we will take (1+2) because (1+2) = 3 ]
♦ x² - 3x - 2
= x² - (1+2)x - 2
= x² - x - 2x - 2
[ after this we need to find the common out ]
= x(x-1) - 2(x+1)
[ here, x and -2 are common ]
[ here, we had done this because -2(x+1) = -2x-2 ]
= x(x+1) + 2(x-1)
[ we done this here because 2(x-1) = 2x-2 ]
= (x-1) (x+2)
[ take (x-1) as common, and x and 2 are left so take them as (x+2) ]
Answer is (x-1) (x+2)
Step-by-step explanation:
♦ x²- 3x - 2
[ here, the first thing is to find the militon factor of the middle term i.e. 3x by spliting ]
[ to find the militon factor of 3x take the first and the last digits ]
[ here, we donot count x² as digit so instead take 1 ]
[ first no. × second no. ]
1 × 2
[ now, in militon factor, the number which is formed i.e. 1 × 2, we need to take this number either by addition or by subtraction (according to the middle term) , here we will take (1+2) because (1+2) = 3 ]
♦ x² - 3x - 2
= x² - (1+2)x - 2
= x² - x - 2x - 2
[ after this we need to find the common out ]
= x(x-1) - 2(x+1)
[ here, x and -2 are common ]
[ here, we had done this because -2(x+1) = -2x-2 ]
= x(x+1) + 2(x-1)
[ we done this here because 2(x-1) = 2x-2 ]
= (x-1) (x+2)
[ take (x-1) as common, and x and 2 are left so take them as (x+2) ]
Answer is (x-1) (x+2)
[ after this we need to find the common out ]