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Answer:
(d) 2
(a) 1
(c) 0.625
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Answered by
0
Answer:
1).2
2).0
3).0.625
Step-by-step explanation:
1).5x²+4x³-7 where the value of x=1
so we have to put 1 where there is x
so
5×1²+4×1³-7
=5×1+4×1-7
=5+4-7
=9-7
=2
2).
x/y+y/x=1
(x²+y²)/xy=1
x²+y²=xy
x²+y²-xy=0
(x+y)(x²+y²-xy)/(x+y)=0
(x+y)(x²+y²-xy)=0×(x+y)
x³+y³=0
3).
the value of 5/8=
8)5(0.625
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