Question

IF P=6ײ + 2 × Y - 5, Q=2X² - 2 ×Y + 6 R=4 ײ - 2 × Y + 7.Find P+ Q - R

Answer 1

Answer:

12x² + 2y - 6

Step-by-step explanation:

P = 6x² + 2y - 5

Q = 2x² - 2y + 6

R = 4x² -2y + 7

To find: P + Q - R

(6x² + 2y - 5) + ( 2x² - 2y + 6) - (4x² -2y + 7)

= 6x² + 2y - 5 + 2x² - 2y + 6 + 4x² + 2y - 7

= 6x² - 5 + 2x² + 6 + 4x² + 2y - 7

= 12x² - 5 + 6 + 2y - 7

= 12x² + 2y - 6

∴ P + Q - R = 12x² + 2y - 6

Answer 2

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P + Q - R

=(6x² + 2y - 5) + ( 2x² - 2y + 6) - (4x² -2y + 7)

= 6x² + 2y - 5 + 2x² - 2y + 6 + 4x² + 2y - 7

= 6x² - 5 + 2x² + 6 + 4x² + 2y - 7

= 12x² - 5 + 6 + 2y - 7

= 12x² + 2y - 6

∴ P + Q - R = 12x² + 2y - 6

HOPE SO IT WILL HELP.....