Question

SOLVE THE 12 SUM STEP BY STEP EXPLATION ONLY
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Answer 1

Answer:

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Step-by-step explanation:

Subtract the sum of 3xy - x²y² and 3x²y² + xy -5 from -15xy+ x²y² +7.

subtract the sum of 3xy - x²y² and 3x²y² + xy -5

3xy - x²y² and 3x²y² + xy -5

sum these terms we get

(3xy - x²y²) + (3x²y² + xy -5)

= 3xy - x²y² - 3x²y² + xy -5

taking common terms out and sum these

= 3xy +xy -3x²y² - x²y² -5

= 4xy - 4x²y²-5

the sum of 3xy - x²y² and 3x²y² + xy -5 = 4xy - 4x²y²-5

given

subtract the sum of 3xy - x²y² and 3x²y² + xy -5 from -15xy+ x²y² +7.

now subtract

(-15xy+ x²y² +7) - ( 4xy - 4x²y²-5 )

multiply - terms we get

-15xy +x²y²+7-4xy + 4x²y²+5

taking common terms out and

-15xy -4xy +4x²y²+x²y² +7+5

add the common terms we get

= -19 xy +5x²y² +12

therefore -19 xy +5x²y² +12 is the value when we Subtract the sum of 3xy - x²y² and 3x²y² + xy -5 from -15xy+ x²y² +7.

main rule here is sum and subtract