plzzzzz solve Q15 plzzzzzzzzz
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Hi Rohit,
use (a-b)^2 = a^2 + b^2 - 2ab formula.
and expand both terms
(2x- 1/3)^2 = 4x^2 + 1/9 -4x/3
(x- 5/3)^2 = x^2 + 25/9 -10x/3
now its simple subtraction from here as given in the question
(2x- 1/3)^2 - (x- 5/3)^2
= ( 4x^2 + 1/9 -4x/3 ) - ( x^2 + 25/9 -10x/3 )
= (4x^2 - x^2) + (1/9 - 25/9) + (-4x/3 -(-10x/3) ) )
= 3x^2 - 24/9 + 6x/3
= 3x^2 + 2x - 8/3
hope it helped you.
Please let me know if any further doubt.
use (a-b)^2 = a^2 + b^2 - 2ab formula.
and expand both terms
(2x- 1/3)^2 = 4x^2 + 1/9 -4x/3
(x- 5/3)^2 = x^2 + 25/9 -10x/3
now its simple subtraction from here as given in the question
(2x- 1/3)^2 - (x- 5/3)^2
= ( 4x^2 + 1/9 -4x/3 ) - ( x^2 + 25/9 -10x/3 )
= (4x^2 - x^2) + (1/9 - 25/9) + (-4x/3 -(-10x/3) ) )
= 3x^2 - 24/9 + 6x/3
= 3x^2 + 2x - 8/3
hope it helped you.
Please let me know if any further doubt.
Anonymous:
no one will understand it
u did totally wrong
3x^2 + 2x - 8/3 is the final answer
ok wait
i m asking a question with my own answer
@rohit did u understand ?
is it correct
yes it pls follow the stepwise
@rohit let me know where u cuould not understand ? which step ?
@rohit hope its clear now?
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