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Question
Subtract:
10x2 from −7x2
Solution
Change the sign of the term of the expression that is to be subtracted and then add.
Term to be subtracted = 10x2
Changing the sign of each term of the expression gives -10x2.
On adding:
−7x2 + (-10x2) = −7x2 −10x2
= (−7−10)x2
= −17x2
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