1 - ALGEBRAIC EXPRESSIONS Gr10 in the following expressions, TWENTY possible solutions are provided for the instruction:
Factorise fully or simplify. FIVE of the twenty solutions are algebraically correct and the rest are
incorrect.
1. Identify and CIRCLE OR CROSS the LETTER that represent solutions with correct
answers
(15)
2. From the FIFTEEN incorrect solutions, identify and underline the mistakes made in
EACH.
3. Correct the mistakes made in EACH incorrect solution.
(35)
Possible solutions
Corrected solutions if identified to be
incorrect.
Z e. g. 6px - 12px = 6p(x-2x)
6px? - 12px = 6px(x - 2)
A 4a2 - 8ab3
= 2a(ab - 463)
N
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Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

What is the product? a-3/15a × 5/a-3

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α. part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part b suppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part c now try a numerical problem. what is the direction of the vector w = < -1, 6 > ?