Question

Find and correct the errors in the following mathematical statements.
2.) x(3x + 2) = 3x2 +2
4.) x + 2x + 3x = 5x
5.) 5y + 2y + y – 7y = 0
6.) 3x + 2x = 5x2
7.) (2x)2 + 4(2x) + 7 = 2x2 + 8x + 7
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Answer 1

Answer:

2 )3x^2+2x

4) 6x

5) 1

6) 5x

7) 19x^2

Answer 2

Answer:

x(3x+2)=3×2+2

x+2x+3x=6x

5y+2y+y-7y=y

3x+2x=5×2

(2x)2+4(2x)+7=2×2+8x+7