1.

Daniel expanded the expression as shown.

Answer»

cond term should be POSITIVE because negative MULTIPLIED to a negative always give positive.( 2nd Option)⇒ The last term shoul be -2/3 and not -5/4. (3rd Option)⇒It should be 16x and not 10X. He had added INSTEAD of multiplying it. (4TH Option)



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