Question

from the sum of 5a²-4a+2 and -8a²+5a+7 subtract a²+7a-4


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Answer 1

To Find :

• we need to subtract a² + 7a - 4 from the sum of 5a²-4a+2 and -8a²+5a+7

Solution :

Let's firstly find the sum of 5a²-4a+2 and -8a²+5a+7.

⇛5a² - 4a + 2 + (- 8a² + 5a + 7)

⇛5a² - 4a + 2 - 8a² + 5a + 7

⇛ 5a - 4a - 8a² + 5a² + 7 + 2

⇛ a - 3a² + 9

Now subtracting a² + 7a - 4 from a - 3a² + 9

⇛a - 3a² + 9 - (a² + 7a - 4)

⇛a - 3a² + 9 - a² - 7a + 4

⇛ - 4a²- 6a + 13

From the sum of 5a²-4a+2 and -8a²+5a+7 subtract a²+7a-4 we get - 4a²- 6a + 13.

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Answer 2

Answer:

-4a² - 6a + 13

Step-by-step explanation:

There are two parts of the questions.

PART I

Firstly we need to add 5a²-4a+2 and -8a²+5a+7.

Therefore,

5a² - 4a + 2 + ( -8a² + 5a + 7)

= 5a² - 4a + 2 -8a² + 5a + 7

= 5a² - 8a² - 4a + 5a + 2 + 7

= -3a² + a + 9

PART II

Now we need to subtract a²+7a-4 from -3a² + a + 9.

Therefore,

-3a² + a + 9 - (a²+7a-4)

= -3a² + a + 9 - a² - 7a + 4

= -3a² - a² + a - 7a + 9 + 4

= -4a² - 6a + 13

NOTE : WHILE ADDING OR SUBTRACTING ALGEBRAIC TERMS TRY TO GROUP THE LIKE TERMS TOGETHER. IF YOU DO THIS THERE IS VERY LESS CHANCE OF MISTAKE.

FINAL ANSWER : -4a² - 6a + 13

HOPE IT HELPS YOU :)

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