JAMB - Mathematics (2018 - No. 36)
Evaluate (2√3 - 4) (2√3 + 4)
-4
-2
2
4
Explicaţie
2√3 - 4) ( 2√3 + 4)
= 12 + 8√3 - 8√3 – 16
= 12 – 16
= -4
The two expressions in the bracket are conjugate of each other
2√3 - 4) ( 2√3 + 4)
= 12 + 8√3 - 8√3 – 16
= 12 – 16
= -4
The two expressions in the bracket are conjugate of each other