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(x+10)(x-3) - (x+4)(x+2) + 29
Aplicando prop distributiva:
x² + 10x - 3x - 30 - (x²+4x+2x+8) + 29
x² + 7x - 30 - x² - 6x - 8 + 29
Aplicando prop asociativa:
(x²-x²) + (7x-6x)+(-30-8+29)
x - 9
Eso es todo! Saludos! Jeizon1L