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Solve the simultaneous equations: [4x-y=3] and [6x +2y=1]

(1) 4x-y=3(2) 6x+2y=1Eliminate y; (1) X 2 => (3) 8x-2y=6 Add (2) to (3) 8x - 2y = 6 +(6x + 2y) = 114x = 7x=1/2 If x=1/2 then,2-y=3 y= -1
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Answered by Andrew G. • Maths tutor
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Factorise 5 – 10m

5(1-2m)
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Answered by Rocio C. • Maths tutor
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Expand (x+3)(x+6)

Step 1 Using the crab methodLooking at the first bracket:Multiply x by x to give x 2 Then multiply x by 6 to give 6xThen move onto 3 Multiply 3 by x to give 3xThen multiply 3 by 6 to give 18 Add all these to...
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Answered by Alexandra B. • Maths tutor
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Show that (x + 1)(x + 2)(x + 3) can be written in the form ax3 + bx2 + cx + d where a, b, c and d are positive integers.

(x 2 +3x+2)(x+3) = x 3 +3x 2 +3x 2 +9x+2x+6 = x 3 +6x 2 +9x+2x
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Answered by Rocio C. • Maths tutor
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Write 7.264 51 correct to 3 decimal places.

7.265
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Answered by Rocio C. • Maths tutor
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