As a part of donation campaign, students of grade VIII collected ₹49x2-84xy + 36y2. Each student contributed an amount equal to the number of students. Find the amount contributed by each student.
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Given : As a part of donation campaign, students of grade VIII collected ₹ 49x² - 84xy + 36y² .
Each student contributed an amount equal to the number of students
To Find : the amount contributed by each student.
Solution:
49x² - 84xy + 36y² .
= (7x)² - 2(7x)(6y) + (6y)²
a² - 2ab + b² = (a - b)²
a = 7x , b = 6y
= (7x - 6y)²
Each student contributed an amount equal to the number of students
Hence the amount contributed by each student.
= | 7x - 6y |
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