Answer: +42x
Step-by-step explanation:
The student only multiplied each term individually.
He should have (7x+3)² = (7x+3)(7x+3)
Which is 49x²+42x+9
Therefore the error is (42x) or the failure to apply the law of multiplication of variables in a bracket.
27 1/5 + 2/6
\\Convert to like fractions:
= 27 6/30 + 10/30
\\Add the fractions
= 27 16/30
\\Simplify by dividing by 2
= 27 8/15
Answer: 27 8/15
