(X+4)sq - (x-5)sq =9
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I didnt understand it
Opening the sq brackets a+b sq = a2 +b2 +2ab
Does this sum have other step
Yes
Tq i got the ans from someone else tq for ur help
Welcome
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Answered by
1
using a square -b square=(a+b)(a-b)
{x+4+x-5}{(x+4)-(x-5)}=9
(2x-1){x+4-x+5}=9
(2x-1)×9=9
2x-1=1
2x=2
x=1
{x+4+x-5}{(x+4)-(x-5)}=9
(2x-1){x+4-x+5}=9
(2x-1)×9=9
2x-1=1
2x=2
x=1
Wrong
How did 2x-1 change to 2x+1
How did u get 2x-1
let (x-4) square=a square & (x-5)squ=b squ
then u should use the formula of a square - b square
Changed the answer?
oh at first time i didn't notice that there is( -) sorry
Ok
Tq zarvis i got the ans from someone else tq for ur help
it's ok
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