Maths help please

[Igcse100]

A= 2 -3 B=4 3x C= 10 -15
-2 5 0 -1 -2 3

(a) A + 2B = C.

(i) Write down an equation in x.
Answer (a)(i) ................................................

(ii) Find the value of x.
Answer (a)(ii) x = ...........................................

(b) Explain why C does not have an inverse.
Answer (b) ...................................................

(c) Find A –1, the inverse of A.
Answer (c)

 

[XPFMember]

A= (2 -3 B=(4 3x C= (10 -15
-2 5) 0 -1) -2 3)

(a) A + 2B = C.

(i) Write down an equation in x.
Answer (a)(i) ................................................

(ii) Find the value of x.
Answer (a)(ii) x = ...........................................

(b) Explain why C does not have an inverse.
Answer (b) ...................................................

(c) Find A –1, the inverse of A.
Answer (c)

Evaluate A + 2B = C
u'll get
(2 -3 + (8 6x = (10 -15
-2 5) 0 -2) -2 3)

(a) (i) -3 + 6x = -15 (u will write the corresponding values on LHS and RHS)
(ii) solve the eqn.. ... u'll get x= -2
(b) that first find |A|
annd then find A-1....i think u know how to find the inverse!! otherwise let me know