Question

Q-2 If x=(-2), find the value of the following:
(1) 3x² + 5x

(2)x³ - 2x + 1

(3) x² + 3x + 1

(4) 3x² - 5x

please give me answer right standard 7 maths ​

Answer 1

Answer:

(1) 12-10=2

(2)8+4+1=13

(3)4-6+1= -1

(4)12+10=22

Answer 2

Step-by-step explanation:

(1) 3 * (-2) * (-2) + 5 * (-2)

12-10 = 2

(2) (-2) * (-2) * (-2) - 2 * (-2) + 1

-8 -(-4) + 1

-8+4+1 = -3

(3) (-2) * (-2) + 3 * (-2) + 1

4 + (-6) + 1

4-6+1 = -1

(4) 3 * (-2) * (-2) - 5 * (-2)

12-(-10)

12+10 = 22