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# show that the equation 3​x​2+7xy+2y2+5x+5y+2=0 represents apair of straight lines and also find the separate equation of the straight lines

Arun
25763 Points
3 years ago
Dear Shreyas

Find $\Delta$ for this equation and it should be zero for a pair of straight lines.

$\Delta$ = abc + 2fgh -af² - bg²  - ch²