Question

6 Simplify these expression and find
this value it a = -1, b= -2
a) 2a-ab-4-sta​

Answer 1

Step-by-step explanation:

• 2a - ab - 4 - sta
• 2(-1) - (-1 × -2) - 4 - st(-1)
• -2 - (2) - 4 - (-st)
• -2 - 2 - 4 + st
• -2 - 6 + st
• -8 + st = 0
• st = 8

Answer 2

Step-by-step explanation:

• 2(-1) - (-1) (-2) - 4 - st(-1)
• -2 - (2) - 4 + st
• -2 - 2 - 4 + st
• -2 - 6 + st
• -8 + st = 0
• st = 8