Answer:
Althea
Step-by-step explanation:
Althea has the correct answer. and Ann Janet had the 1st process correct. until she grouped the terms.
(15x²+12x+20 )+(-9x² -10x -5)
by grouping:
(15x² - 9x²) + (12x -10x) + (20 - 5)
while Ann Janet's mistake is: (15x² "+" 9x²) is not = 6x²
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Answers & Comments
Answer:
Althea
Step-by-step explanation:
Althea has the correct answer. and Ann Janet had the 1st process correct. until she grouped the terms.
(15x²+12x+20 )+(-9x² -10x -5)
by grouping:
(15x² - 9x²) + (12x -10x) + (20 - 5)
while Ann Janet's mistake is: (15x² "+" 9x²) is not = 6x²