in which of the following the two expression (a) 7x and 7y (b) 7x and 9x (c) 7x and 7x square (d) 7x and 7xy
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Answer:
(b) 7x and 9x
Step-by-step explanation:
u can see 7 and 9 are constants that is numbers and x is a variable so same variable are like terms
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