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3 years ago

Simplify the expressions and evaluate for (i) y = -2, (ii) y = 3. 3y (2y-7) - 3 (y - 4) - 63

Mathematics

1 answer:

Diano4ka-milaya [45]3 years ago

8 0

Simplified expression is 6y² - 24y - 51. Value for y=-2 is 21 and value for y=3 is -69.

Step-by-step explanation:

Step 1: Given expression is 3y(2y-7) - 3(y - 4) - 63. Simplify it.

⇒ 6y² - 21y - 3y + 12 - 63

⇒ 6y² - 24y - 51

Step 2: Find value of the expression for y = -2

⇒ 6y² - 24y - 51 = 6(-2)² - 24(-2) - 51 = 24 + 48 - 51 = 21

Step 3: Find value of the expression for y = 3

⇒ ⇒ 6y² - 24y - 51 = 6(3)² - 24(3) - 51 = 54 - 72 - 51 = -69

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Step-by-step explanation:

2081.25 ; 2312.50 ; 2543.75 ; ..... 7500

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