Question

when x = 3 , a = 1 , b = 2
(i) 2 ( x² - 3× ) -5 ( 7× -4 )​

Answer 1

Answer:

-85

Step-by-step explanation:

2(x²-3x)-5(7x-4)

• 2(3²-3×3)-5(7×3-4)
• 2(9-9)-5(21-4)
• 2(0)-5(17)
• 0-5×17
• -85