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secondary 3 | A Maths
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pls help
Date Posted: 2 years ago
Views: 446
f(2)
= 8-a²+2a+7 = 15 - a² + 2a
f(-1)
= -1-a² - a+7 = 6 - a² - a
f(2) = 2f(-1)
⇨
15-a²+2a = 2(6-a²-a)
a² + 4a + 3
= (a+1)(a+3) = 0
⇨
a₁ = -1
a₂ = -3
https://www.youtube.com/watch?v=1chTf7afHGw
= 8-a²+2a+7 = 15 - a² + 2a
f(-1)
= -1-a² - a+7 = 6 - a² - a
f(2) = 2f(-1)
⇨
15-a²+2a = 2(6-a²-a)
a² + 4a + 3
= (a+1)(a+3) = 0
⇨
a₁ = -1
a₂ = -3
https://www.youtube.com/watch?v=1chTf7afHGw
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done
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my answer seems to be different from your answer key… but i don’t think mine is wrong? let me know
Date Posted:
2 years ago
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