3 years ago

20 POINTS need help asap no links plz

Mathematics

2 answers:

Sav [38]3 years ago

4 0

Answer:

${ \bf{ {3x}^{2} + 7xy + 9x + ( - 8xy) + {21x}^{2} }} \\ = {24x}^{2} - xy + 9x \\ = { \tt{ {24x}^{2} + 9x - xy }}$

RSB [31]3 years ago

4 0

Answer:

Step-by-step explanation:

Given

3x² + 7xy + 9x + (- 8xy) + 21x² [ note + ( - ) = - ]

= 3x² + 7xy + 9x - 8xy + 21x² ← collect like terms

= 3x² + 21x² + 9x + 7xy - 8xy

= 24x² + 9x - xy → A

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