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Question
गुणा करो।
(4x + 5y) × (9x + 7y)
Sum
Solution
(4x + 5y) × (9x + 7y)
= 4x(9x + 7y) + 5y(9x + 7y)
= 4x × 9x + 4x × 7y + 5y × 9x + 5y × 7y
= 36x2 + 28xy + 45xy + 35y2
= 36x2 + 73xy + 35y2
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Chapter 4.4: बैजिक व्यंजक और उनपर की जाने वाली संक्रियाएँ - प्रश्नसंग्रह 35 [Page 90]
