Advertisements
Advertisements
Question
If a = 3, b = 0, c = 2 and d = 1, find the value of a2 + 2b2 − 3c2
Sum
Solution
a2 + 2b2 − 3c2
= 32 + 2 × 02 − 3 × 22
= 9 + 0 − 3 × 4
= 9 − 12
= − 3
shaalaa.com
Concept of Substitution
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
If x = 2, y = 5 and z = 4, find the value of the following:
`("x"^2"y"^"x")/"x"`
Simplify:
`"a"-(2"a"-overline(4"a"+3"a"))`
Simplify:
`5"x"^2-(3"x"-overline("x"^2-4))`
Simplify:
x − (y − z) + x + (y − z) + y − (z + x)
Insert the bracket as indicated:
m + n − p = − (.............)
Insert the bracket as indicated:
2x − y + 2z = 2z − (....................)
If x = 3, y = 2 and z = 1; find the value of yx
If P = − 12x2 – 10xy + 5y2, Q = 7x2 + 6xy + 2y2, and R = 5x2 + 2xy + 4y2 ; find Q + P
If x = a2 – bc, y = b2 – ca, and z = c2 – ab; find the value of ay – bx + cz
Simplify:
`8"x"−(3"x"−overline(2"x"-3))`
