prove that the straight lines x+2y+1=0 and 2x-x+5=0 are perpendicular to each other
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if two lines are perpendicular then slopes are the product of itselfs and negative one
slope 1st line =-1÷2 and 2nd line =2 so.
-1÷2×2=-1 therefore they are perpendicular to each other
slope 1st line =-1÷2 and 2nd line =2 so.
-1÷2×2=-1 therefore they are perpendicular to each other
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