Question

rút gọn biểu thức:

(3x+4)²+(4x-1)² + (2x+5)(2x-5)

 

Answer 1

(3x+4)²+(4x-1)²+(2x+5)(2x-5)

=9x²+24x+16+16x²-8x+1+4x²+25

=9x²+16x²+4x²+24x-8x+16+1+25

=29x²+16x+4x

Answer 2

  (3x+4)²+(4x-1)²+(2x+5)(2x-5)

= (9x²+24x+16)+(16x²-8x+1)+(4x²-25)

=29x²+16x-8

Answer 3

(3x + 4)² + (4x-1)² + (2x+5)(2x - 5)

= (9x² + 24x + 16) + (16x² - 8x + 1²) + (4x² - 25)

= 9x² +24x + 16 +16x² - 8x + 1 + 4x² -25

=29x² 16x - 8