2 - Yo
15, JA = Uy2 – 3x² - 6xy, B=542-
and (= 7x2 + 5x4 - 942 Find
of 영
At Btc
+ xy
the value
Answers
Answer:
please Witte clearly
Step-by-step explanation:
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Answer:
The required sum = 3x + 7x
= (3 + 7) x
= 10x
(ii) The required sum = 7y + (-9y)
= 7y – 9y
= (7 -9) y
= -2y
(iii) The required sum = 2xy + 5xy + (-xy)
= 2xy + 5xy – xy
= (2x + 5x –x) y
= 6xy
(iv) The required sum = 3x + 2y
= 3x + 2y
(v) The required sum = 2x2 + (-3x2
) + 7x2
= 2x2
- 3x
2 + 7x2
= (2 - 3 + 7) x2
= 6x2
(vi) The required sum = 7xyz + (-5xyz) + 9xyz + (-8xyz)
= 7xyz – 5xyz + 9xyz – 8xyz
= (7 – 5 + 9 – 8) xyz
= (16 – 13) xyz
= 3xyz
(vii) The required sum = 6a3 + (-4a3
) + 10a3 + (-8a3
)
= 6a3 – 4a3 + 10a3 – 8a3
= (6 – 4 + 10 – 8) a3
= (16 – 12) a3
= 4a3
(viii) The required sum = (x2 – a
2
) + (-5x2 + 2a2
) + (-4x2 + 4a2
)
= x2
- a
2 – 5x2 + 2a2 – 4x2 + 4a2
= (1 – 5 – 4) x2 – (1 – 2 – 4) a2
Step-by-step explanation: