Bonjour;
2x*7x -9x *2 +8 +7x*3 -5x*3 +4
= 14x² - 18x +8 + 21x - 15x +4
= 14x² + 21x - 18x - 15x + 4 +8
= 14x² +21x - 33x +12
= 14x² - 12x +12
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Bonjour;
2x*7x -9x *2 +8 +7x*3 -5x*3 +4
= 14x² - 18x +8 + 21x - 15x +4
= 14x² + 21x - 18x - 15x + 4 +8
= 14x² +21x - 33x +12
= 14x² - 12x +12