Question

wa the errors and correct the following mathematical sentences
(i) 3(x - 9) = 3x - 9
(ii) x(3x + 2) = 3x2 + 2
(ii) 2x + 3x = 5x?
(iv) 2x + x +3x = sx
(v) 4p + 3p + 2p+p-9p = 0
(vi) 3x+2y = 6xy
(vii) (3x)2 + 4x +7 = 3x² + 4x +7 (viii) (2x)2 + 5x = 4x + 5x = 9x
(ix) (2a + 3)2 = 2a +6a +9
(x) Substitute x =- 3 in
(a) x + 7x + 12 = (-3)2 + 7 (-3) + 12 = 9+4 + 12 = 25
(b) x² – 5x +6=(-3)2 –5 (-3) + 6 = 9 – 15 +6 = 0
(C) x² + 5x = (-3)2 + 5 (-3) +6=-9 - 15 = -24
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Answer 1

Answer:

(i) 3(x - 9) = 3x - 18

(ii) x(3x + 2) = 3x²+ 2x

(ii) 2x + 3x = 5x

(iv) 2x + x +3x = 6x

(v) 4p + 3p + 2p+p-9p = 10p-9p=p

(vi) 3x+2y = 3x+2y

(vii) (3x)2 + 4x +7 = 6x+ 4x +7=10x+7

(viii) (2x)2 + 5x = 4x + 5x = 9x

(ix) (2a + 3)²= 4a²+12a+9

(x) Substitute x =- 3 in

(a) x + 7x + 12 = (-3) + 7 (-3) + 12 = -3+4 + 12 = 13

(b) x² – 5x +6=(-3)² –5 (-3) + 6 = 9 + 15 +6 = 30

(C) x² + 5x = (-3)² + 5 (-3) =9-15 = -6

Hope this would help...

Answer 2

Answer:

(ii) x(3x + 2) = 3x2 + 2 (ii) 2x + 3x = 5x? (iv) 2x + x +3x = sx (v) 4p + 3p + 2p+p-9p = 0 (vi ) 3x+2y = 6xy (vii) (3x)2 + 4x +7 = 3x² + 4x +7

Step-by-step explanation:

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