Read the text again. match topics 1-4
with paragraphs a-e.
ben introduces himself.
1 ben's ideas for the future.
2 he talks about the inventor of
the game and when he invented it.
3 he describes the game.
4 he talks about the popularity of

Question

Алгебра: Read the text again. match topics 1-4 with paragraphs a-e. ben introduces himself. 1 ben s ideas for the future. 2 he talks about the inventor of the game and when he invented it. 3 he describes the game. 4 he talks about the popularity of ​

creator4567 · Accepted Answer

Точно не знаю, я еще такого не решал , но судя по твоим вопросам можно попробовать выделить неполный квадрат.
у²-3у - 1 = у² - 2 *1,5 у + (1,5)² - 3,25= (у-1,5)²- 3,25
если у² -3у -1 = 11 , следовательно :
(у-1,5)² - 3,25=11
(у-1,5)²= 11+3,25
(у-1,5)²=14,25

Теперь выделим неполный квадрат из второго выражения:
8у²- 24у - 9 = 8 (у²- 3у - 9/8 ) = 8(у²-3у -1,125) =
= 8 ( у² -3у + 2,25 - 3,375) = 8 (( у-1,5)² - 3,375 ) =
= 8(у-1,5)² - 8 * 3,375 = 8(у-1,5)² - 27

если (у-1,5)²=14,25 , то из второго выражения получается:
8*14,25 -27 = 114-27 = 87

ответ: если у²-3у-1=11 , то 8у²-24у -9 = 87.

Read the text again. match topics 1-4with paragraphs a-e.ben introduces himself.1 ben's ideas for the future.2 he talks about the inventor ofthe game and when he invented it.3 he describes the game.4 he talks about the popularity of ​

MOGZ ответил

Read the text again. match topics 1-4
with paragraphs a-e.
ben introduces himself.
1 ben's ideas for the future.
2 he talks about the inventor of
the game and when he invented it.
3 he describes the game.
4 he talks about the popularity of