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judoshka72
@judoshka72
July 2022
1
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(2х+1)²-3(х-5)²=(х+3)(х-3) помогите плс
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Lesben
Verified answer
( 2х + 1 )^2 - 3( х - 5 )^2 = ( х + 3 )( х - 3 )
4х^2 + 4х + 1 - 3( х^2 - 10х + 25 ) = х^2 - 9
4х^2 + 4х + 1 - 3х^2 + 30х - 75 = х^2 - 9
х^2 + 34х - 74 = х^2 - 9
34х = 65
х = 1 31/34
2 votes
Thanks 2
Lesben
65/34= 34/34 + 31/34 = 1 31/34
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Answers & Comments
Verified answer
( 2х + 1 )^2 - 3( х - 5 )^2 = ( х + 3 )( х - 3 )4х^2 + 4х + 1 - 3( х^2 - 10х + 25 ) = х^2 - 9
4х^2 + 4х + 1 - 3х^2 + 30х - 75 = х^2 - 9
х^2 + 34х - 74 = х^2 - 9
34х = 65
х = 1 31/34