Ответ:
1) 10a^2 + 4ab + 25ab + 10b^2
2) -3y +10 - y^2
3) y^2 - xy - 6x^2
4) 22q -8 - 15q^2
Объяснение:
1) (2a+5b)*(5a+2b) = 2а*5а + 2а* 2b + 5b * 5a + 5b * 2b= 10a^2 + 4ab + 25ab + 10b^2
2) (2-y)*(y+5) = 2*y + 2*5 - y*y - y*5 = -3y +10 - y^2
3) (y+2x)*(y-3x) = y*y - 3x*y + 2x*y - 2x*3x= y^2 - xy - 6x^2
4) (4-5q)*(3q-2) = 4*3q - 4*2 - 5q*3q + 5q*2 = 22q -8 - 15q^2
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Ответ:
1) 10a^2 + 4ab + 25ab + 10b^2
2) -3y +10 - y^2
3) y^2 - xy - 6x^2
4) 22q -8 - 15q^2
Объяснение:
1) (2a+5b)*(5a+2b) = 2а*5а + 2а* 2b + 5b * 5a + 5b * 2b= 10a^2 + 4ab + 25ab + 10b^2
2) (2-y)*(y+5) = 2*y + 2*5 - y*y - y*5 = -3y +10 - y^2
3) (y+2x)*(y-3x) = y*y - 3x*y + 2x*y - 2x*3x= y^2 - xy - 6x^2
4) (4-5q)*(3q-2) = 4*3q - 4*2 - 5q*3q + 5q*2 = 22q -8 - 15q^2