Simplify (5x^2 + 3x + 4) + (2x^2 − 6x + 3).

7x² - 3x + 7

Step-by-step explanation:

Step 1: Write out expression

5x² + 3x + 4 + 2x² - 6x + 3

Step 2: Combine like terms (x²)

7x² + 3x + 4 - 6x + 3

Step 3: Combine like terms (x)

7x² - 3x + 4 + 3

Step 4: Combine like terms (constants)

7x² - 3x + 7

Step-by-step explanation:

Removing brackets.

Grouping like terms.

Combining like terms.

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

40% off the regular price is the correct answer.

step-by-step explanation: