Question

Find the product of. a)3x²,4y²,7xy²​

Answer 1

Step-by-step explanation:

Let the number substacted be a

Then

3x²-4y²+5xy+20-a= -x²-y²+6xy+20

3x²+x²-4y²+y²+5xy-6xy+20-20=a

4x²-3y²-xy=a

Then the number which should taken away is 4x²-3y²-xy

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Answer 2

Answer:

84x³y⁴

3x²x4y²x7xy²

=84x³y⁴​

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