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In a[f(x)]2+b[f(x)]+c=0a[f(x)]^2+b[f(x)]+c=0a[f(x)]2+b[f(x)]+c=0, what should be replaced by a temporary variable?
A
If b2−4ac=0b^2-4ac=0b2−4ac=0, the quadratic in uuu has one repeated real value of uuu.
B
The complete repeated expression f(x)f(x)f(x).
C
u=x3u=x^3u=x3, so x6=u2x^6=u^2x6=u2.
D
3u2−2u−7=03u^2-2u-7=03u2−2u−7=0.
Card 1 of 20
1.2.5 Algebra and Functions Flashcards
20 flashcards on WJEC A Level Maths 1.2.5 Algebra and Functions: the key formulae, methods and definitions you need to recall for AS Unit 1, AS Unit 2, A2 Unit 3 and A2 Unit 4.