Question

please help me in MCQ please answer 15 to 17 please tell correct answer please don't play please tell correct answer​

Answer 1

Answer:

15. 249²-248²= (249+248) (249-248)

= 497 ×1

= 497

16. 4x²+8x +3

= 4x²+6x+2x+3

= 2x(2x+3)+ 1(2x+3)

= (2x+1) (2x+3)

17. (x+y)³-(x³+y³)

= x³+y³+3x²y+3xy²-x³-y³

=3x²y+3xy²

=3xy(x+y)

Answer 2

Ans:-

15. = 249² - 248²

= (249+248)(249-248) (byusing a²-b²=(a+b)(a-b)

= 497 × 1

= 497

16. 4x²+8x+3

= 4x²+6x+2x+3

= 2x(2x+3)+1(2x+3)

= (2x+3)(2x+1)

17. (x+y)³ - (x³+y³)

= x³+y³+3xy²+3yx² - x³ - y³

= 3xy²+3yx²

= 3xy(x+y)

hence 3xy is a factor (x+y)³-(x³+y³)

here is your answer

hope it will help you