Question

Simplify (5x2 + 3x + 4) + (5x2 + 5x − 1).

10x2 + 8x + 5
25x2 + 8x + 3
10x2 + 8x + 3
10x2 + 8x − 3

Answer 1

first step to remove brackets

here write them in serial order,

=5x²+3x+4+5x²+5x-1

=5x²+5x²+3x+5x+4-1

=10x²+8x-3

Answer 2

If I'm not mistaken your answer should be the third option: 10x2 + 8x + 3

please tell me if im wrong

Explanation: