Предмет: Алгебра, автор: hokageomg27

8. Спростіть вираз:
1) (-3т + 4y)2 – (-5y + Зm) (Зm + 5y) + 24ту = ...;
2) (t + 2) (t2 – 2t + 4) — t(t+3)(t — 3) = ....
ПЖЖ ЦЕ КР ДОПОМОЖІТЬ!!!​

Ответы

Автор ответа: akerkeajbarova952
1

Ответ:

1)(-3t + 4y)2 – (-5y + Зm) (Зm + 5y) + 24tу

-6+8y(-3t-5y)(3t+5y)+24ty

-6t+8y-(9t²-25y²)+24ty

-6t+8y-9t²+25y²+24ty.

2)( t + 2) (t2 – 2t + 4) — t(t+3)(t — 3)

(t+2)×4-t(t²-9)

4t+8-t³+9t

13t+8-t³

-t³+13t+8.

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Complete the text using the correct passive form of one of the verbs below in each space.

Did nothing always exist or ________________________
it ________________________
(INVENT)? 'Nothing' is zero or nought. It is a very useful idea and it ________________________
(CALL) by many different names. In football, 0 ________________________
(REFER) to as 'nil'. So we say: "Liverpool ________________________
or ________________________
(BEAT) two-nil (2-0) at home by Manchester United." When you ________________________
(GIVE) marks in a test, you hope you will never get 'nought' out of ten or twenty. When we talk about the temperature, 'zero' ________________________
(USE). We say: "It is freezing today; the temperature has dropped to five below zero." The most unusual name for 0 must be that which ________________________
(USE) in tennis, 'love'; where the scoring goes 15-love, 30-love and so on. Not many people realize that 0 did not always exist but is something that had to ________________________
(INVENT). Until the sixteenth century, the number system used in Europe was the Roman system, which ________________________
(INVENT) about two thousand years ago. The Roman system is not simple, for example the mark 'X' stands for ten and 'C' refers to a hundred. A much better number system ________________________
(INVENT) by the Hindus much earlier. The Hindu system ________________________
(BRING) to Europe in AD 900 by the Arabs and ________________________
sometimes ________________________
(REFER) to as the 'Arabic system'. This system ________________________
(BUILD) on a base of ten and all numbers ________________________
(WRITE} with the digits; 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0. So as all schoolchildren know, 10 means 'ten' and 40 means 'four times ten'.