Question

1.evaluate the algebraic expressions
a.
$- 7 {x}^{2} + 18 {x}^{2} + 3 {x}^{2} - 5 {x}^{2}$
b.
$abx - 15abx - 10abx + 32abx$
c.
$3 {x}^{2} + 5xy - 4 {y}^{2} + {x}^{2} - 8xy - 5 {y}^{2}$
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Answer 1

Answer:

$7 {x}^{2} + 18 {x}^{2} + 3 {x}^{2} - 5 {x}^{2} \\ = 28 {x}^{2} - 5 {x}^{2} \\ = 23 {x}^{2}$

Step-by-step explanation:

b.

$abx - 15abx - 10abx + 32abx \\ = 33abx - 25abx \\ = 8abx$

c.

$3 {x}^{2} + 5xy - 4 {y}^{2} + {x}^{2} - 8xy - 5 {y}^{2} \\ = 4 {x}^{2} - 9 {y}^{2} - 3xy$

Answer 2

Step-by-step explanation:

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