5. Find the value of land m in the following.
(a) 25r^2+ 49 + mr = (5r+ 7)(5r - l)
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Answer:
The question is incomplete I guess
Step-by-step explanation:
25r² + 49 + mr = (5r+7)(5r-1)
⇒25r² + 49 + mr = 25r² + 35r - 5r - 7
⇒25r² + 49 + mr = 25r² + 30r - 7
⇒mr= 25r² + 30r - 7 - 25r² - 49
⇒mr = 30r - 56
⇒ m = (30r - 56)/r
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