10th Grade Algebra
posted by Jason .
Please help me with these factorise algebra questions!!!
1. 9c squared + 30c + 25 - 4d squared
2. 12 + 89 - 4a squared
3. -5x squared + 27x - 10
4. If A= 15x squared - 20x +11 and
B= 1 + 9x+ 5x squared, then A-B when factorised is...
Online, an exponent is indicated by "^", for example, x^2 = x squared.
3. To factor, factor the end terms into two factors (5,-1 or -5,1) and (10, -1 or -10,1 or 5,-2 or -5,2). See which products of the two end terms will add to the center term value.
In this case, (-5x+2)(x-5)
4. 15x^2 -20x + 11 - 1 - 9x -5x^2
Combine like terms and then go through the process indicated for #3.
1. Is there a typo here, the "d" term?
2. If there is no typo here, the two products of the end factor should cancel each other out leaving no middle term.
It would help if you proofread your questions before you posted them.
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