Subject :IMO Class : Class 8
The product of (x2 + 3x + 5) and (x2 – 1) is ____.
A x4 + 3x3 – 4x2 – 3x – 5
B x4 + 3x3 + 4x2 – 3x – 5
C x4 + 3x3 + 4x2 +3x – 5
D x4 + x3 + x + 5
Ans 1:
Class : Class 10
Solution,
=x²(x²+3x+5)-1(x²+3x+5)
=x²*²+3x³+5x²-x²-3x-5
=x²*²+3x³+4x²-3x-5
Answer is option (b).
Ans 2:
Class : Class 10
Solution,
=x²(x²+3x+5)-1(x²+3x+5)
=x²*²+3x³+5x²-x²-3x-5
=x²*²+3x³+4x²-3x-5
Answer is option (b).
Ans 3:
Class : Class 9
B
Ans 4:
Class : Class 9
B
Ans 5:
Class : Class 9
B
Ans 6:
Class : Class 9
B