Question

( x + 1 )² +3( x - 5)(x+ 5)-( 2x-1)²

^{giup minh voi cac ban}

^{de bai la rut gon}

Answer 1

  ( x + 1 )² +3( x - 5)(x+ 5)-( 2x-1)²

=x² + 2x + 1 + 3(x² - 25) - 4x² - 4x + 1

= x² + 2x + 1 + 3x² - 75 - 4x² - 4x + 1

= -2x - 73

k cho mk nhe!!

Answer 2

( x + 1 )² +3( x - 5)(x+ 5)-( 2x-1)²

=x²+2x+1+3x²-75-4x²+4x-1

=(x²+3x²-4x²)+(2x+4x)-(1-1)-75

=6x-75

Vậy ms đúng bn kia sai r`