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secondary 3 | E Maths
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i dont understnad
Date Posted: 1 year ago
Views: 161
(1)
cross multiply
(y-1)² = 8×2 = 16
y-1 = ± 4
y₁ = 5
y₂ = -3
(2)
x² - 3x - 4 = (x-4)(x+1)
times "(x-4)(x+1)" at both side
7 +(x+5)(x+1) = 6(x-4)(x+1)
6(x² - 3x - 4) - (x²+6x+5) - 7
= (6-1)x² - (18+6)x -(24+5+7)
= 5x² - 24x - 36
= (5x+6)(x-6)
x₁ = 6
x₂ = -⁶⁄₅
cross multiply
(y-1)² = 8×2 = 16
y-1 = ± 4
y₁ = 5
y₂ = -3
(2)
x² - 3x - 4 = (x-4)(x+1)
times "(x-4)(x+1)" at both side
7 +(x+5)(x+1) = 6(x-4)(x+1)
6(x² - 3x - 4) - (x²+6x+5) - 7
= (6-1)x² - (18+6)x -(24+5+7)
= 5x² - 24x - 36
= (5x+6)(x-6)
x₁ = 6
x₂ = -⁶⁄₅
See 1 Answer
done
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Question 1 and Question 2
Date Posted:
1 year ago
i get it thank u !
i get it! ty
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