Find the value of:
a) (5x) - 3, where x = -2/5
b) (-ab) + 2, where a = 2 and b= - 1
Answers
Answered by
0
Answer:
Correct option is
D
−73
Given: α,β are zeroes of the polynomial 4x2+3x+7
To find the value of α1+β1
We know that equation ax2+bx+c=0
Then sum of roots =a−b and product of roots=ac
From the given quadratic equation,
α+β=−43 and αβ=47
Therefore,
α1+β1=αβα+β
=47−43=−73
⇒α1+β1=−73
Answered by
1
- 5×(-2/5)-3= -10/5-3
- = -2-3
- =-5 Ans.
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