Simplify the expression and find its value when a = 2 and b = 1/2
The expression is: (3a + 4b - 6) – (2a - 4b + 7)
Answers
Answered by
0
Answer:
-7
Step-by-step explanation:
(3*2+4*1/2)-(2*2-4*1/2+7). 2-4+2-7. -7
Answered by
1
Answer:
-7
Step-by-step explanation:
(3a+4b-6)-(2a-4b+7)
There are two methods to solve it
Method 1. Put the given value directly
(3×2+4+1/2-6)-(2×2-4×1/2+7)
(6+2-6)-(4-2+7)
2-9= -7 Ans.
Method 2. Solve the given equation
3a+4b-6-2a+4b-7 (sign changes when -ve is multiplied)
= a+8b-13
putting value of a and b
= 2+8×1/2-13
= 6-13= -7 Ans
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